Kubernetes Security

  1. Cluster Security
    1. Securing the Control Plane
      1. API Server Security
        1. Disabling Unauthenticated Access
          1. Anonymous Authentication Disable
            1. Insecure Port Disable
              1. Default Service Account Restrictions
              2. TLS Encryption for API Server Communication
                1. Certificate Management
                  1. Certificate Authority Setup
                    1. Certificate Generation
                      1. Certificate Distribution
                      2. Certificate Rotation
                        1. Automated Rotation Procedures
                          1. Manual Rotation Processes
                            1. Certificate Expiry Monitoring
                          2. API Server Authentication Methods
                            1. Client Certificate Authentication
                              1. Certificate-based Client Auth
                                1. Certificate Validation
                                  1. Certificate Revocation Lists
                                  2. Token-based Authentication
                                    1. Bearer Token Authentication
                                      1. Service Account Tokens
                                        1. Token Validation
                                        2. OIDC Integration
                                          1. OIDC Provider Configuration
                                            1. Claims Mapping
                                              1. Group Claims Processing
                                            2. API Server Authorization Modes
                                              1. Role-Based Access Control
                                                1. RBAC Configuration
                                                  1. Role and ClusterRole Management
                                                    1. RoleBinding Management
                                                    2. Attribute-Based Access Control
                                                      1. ABAC Policy Files
                                                        1. Attribute Definition
                                                          1. Policy Evaluation
                                                          2. Node Authorization
                                                            1. Node Identity Verification
                                                              1. Node-specific Permissions
                                                                1. Node Registration Security
                                                                2. Webhook Authorization
                                                                  1. Webhook Endpoint Security
                                                                    1. Authorization Decision Logic
                                                                      1. Webhook Performance Considerations
                                                                    2. API Rate Limiting and Throttling
                                                                      1. Preventing Denial of Service
                                                                        1. Request Rate Limits
                                                                          1. Connection Limits
                                                                            1. Resource-based Throttling
                                                                            2. Configuring API Server Limits
                                                                              1. Priority and Fairness Configuration
                                                                                1. Flow Schema Definition
                                                                                  1. Queue Management
                                                                                2. API Server Audit Logging
                                                                                  1. Audit Policy Configuration
                                                                                    1. Audit Log Formats
                                                                                      1. Audit Log Storage and Retention
                                                                                    2. etcd Security
                                                                                      1. Encrypting etcd Data at Rest
                                                                                        1. Encryption Providers
                                                                                          1. AES-CBC Encryption
                                                                                            1. AES-GCM Encryption
                                                                                              1. External KMS Integration
                                                                                              2. Key Management
                                                                                                1. Key Rotation Procedures
                                                                                                  1. Key Storage Security
                                                                                                    1. Key Recovery Processes
                                                                                                  2. Requiring TLS for etcd Communication
                                                                                                    1. Certificate Configuration
                                                                                                      1. Client-Server TLS
                                                                                                        1. Peer-to-Peer TLS
                                                                                                          1. Certificate Validation
                                                                                                        2. Restricting etcd Access to API Server Only
                                                                                                          1. Network Segmentation for etcd
                                                                                                            1. etcd Network Isolation
                                                                                                              1. Private Network Configuration
                                                                                                                1. Network Policy Implementation
                                                                                                                2. Firewall Rules for etcd
                                                                                                                  1. Port Restrictions
                                                                                                                    1. Source IP Filtering
                                                                                                                      1. Protocol-level Controls
                                                                                                                    2. etcd Backup and Recovery Security
                                                                                                                      1. Encrypted Backup Storage
                                                                                                                        1. Backup Access Controls
                                                                                                                          1. Recovery Procedure Security
                                                                                                                        2. Controller Manager and Scheduler Security
                                                                                                                          1. Hardening Component Configurations
                                                                                                                            1. Secure Configuration Files
                                                                                                                              1. Configuration File Permissions
                                                                                                                                1. Configuration Validation
                                                                                                                                  1. Secure Defaults
                                                                                                                                  2. Disabling Unnecessary Features
                                                                                                                                    1. Feature Gate Management
                                                                                                                                      1. Unused Controller Disable
                                                                                                                                        1. Service Account Token Projection
                                                                                                                                      2. Running with Secure Profiles
                                                                                                                                        1. User and Group Permissions
                                                                                                                                          1. Non-root User Execution
                                                                                                                                            1. Group Membership Management
                                                                                                                                              1. File System Permissions
                                                                                                                                              2. Limiting Network Access
                                                                                                                                                1. Network Policy Application
                                                                                                                                                  1. Port Binding Restrictions
                                                                                                                                                    1. Outbound Connection Controls
                                                                                                                                                  2. Securing Component Communication
                                                                                                                                                    1. Inter-component TLS
                                                                                                                                                      1. Service Account Authentication
                                                                                                                                                        1. Secure Communication Channels
                                                                                                                                                    2. Securing Worker Nodes
                                                                                                                                                      1. Node Hardening
                                                                                                                                                        1. Minimizing the Host OS
                                                                                                                                                          1. Using Minimal OS Images
                                                                                                                                                            1. Container-optimized OS
                                                                                                                                                              1. Stripped-down Distributions
                                                                                                                                                                1. Custom Image Creation
                                                                                                                                                                2. Removing Unnecessary Packages
                                                                                                                                                                  1. Package Inventory Management
                                                                                                                                                                    1. Unused Service Removal
                                                                                                                                                                      1. Development Tool Removal
                                                                                                                                                                    2. Applying Security Patches
                                                                                                                                                                      1. Patch Management Automation
                                                                                                                                                                        1. Automated Update Systems
                                                                                                                                                                          1. Patch Scheduling
                                                                                                                                                                            1. Update Verification
                                                                                                                                                                            2. Patch Verification
                                                                                                                                                                              1. Pre-deployment Testing
                                                                                                                                                                                1. Rollback Procedures
                                                                                                                                                                                  1. Patch Impact Assessment
                                                                                                                                                                                2. Filesystem Permissions and Integrity Monitoring
                                                                                                                                                                                  1. File Integrity Monitoring Tools
                                                                                                                                                                                    1. AIDE Configuration
                                                                                                                                                                                      1. Tripwire Implementation
                                                                                                                                                                                        1. Custom FIM Solutions
                                                                                                                                                                                        2. Restricting Sensitive File Access
                                                                                                                                                                                          1. File Permission Hardening
                                                                                                                                                                                            1. Access Control Lists
                                                                                                                                                                                              1. Sensitive Directory Protection
                                                                                                                                                                                            2. Using Immutable Node Images
                                                                                                                                                                                              1. Golden Image Management
                                                                                                                                                                                                1. Image Build Pipelines
                                                                                                                                                                                                  1. Image Versioning
                                                                                                                                                                                                    1. Image Security Scanning
                                                                                                                                                                                                    2. Image Update Strategies
                                                                                                                                                                                                      1. Blue-Green Node Updates
                                                                                                                                                                                                        1. Rolling Node Updates
                                                                                                                                                                                                          1. Canary Node Deployments
                                                                                                                                                                                                        2. Disabling Unnecessary Services
                                                                                                                                                                                                          1. Service Inventory and Assessment
                                                                                                                                                                                                            1. Service Disable Procedures
                                                                                                                                                                                                              1. Service Monitoring
                                                                                                                                                                                                            2. Kubelet Security
                                                                                                                                                                                                              1. Kubelet Configuration Hardening
                                                                                                                                                                                                                1. Secure Kubelet Flags
                                                                                                                                                                                                                  1. Authentication Configuration
                                                                                                                                                                                                                    1. Authorization Configuration
                                                                                                                                                                                                                      1. TLS Configuration
                                                                                                                                                                                                                      2. Protecting Kubelet Credentials
                                                                                                                                                                                                                        1. Credential File Permissions
                                                                                                                                                                                                                          1. Credential Rotation
                                                                                                                                                                                                                            1. Secure Credential Storage
                                                                                                                                                                                                                          2. Disabling Anonymous Authentication
                                                                                                                                                                                                                            1. Anonymous Auth Disable
                                                                                                                                                                                                                              1. Authentication Requirement Enforcement
                                                                                                                                                                                                                                1. Fallback Authentication Methods
                                                                                                                                                                                                                                2. Enforcing Authorization
                                                                                                                                                                                                                                  1. Webhook Authorization for Kubelet
                                                                                                                                                                                                                                    1. Authorization Webhook Configuration
                                                                                                                                                                                                                                      1. Authorization Decision Logic
                                                                                                                                                                                                                                        1. Webhook Security
                                                                                                                                                                                                                                      2. Read-only Port Management
                                                                                                                                                                                                                                        1. Disabling Read-only Port
                                                                                                                                                                                                                                          1. Alternative Monitoring Methods
                                                                                                                                                                                                                                            1. Health Check Configuration
                                                                                                                                                                                                                                            2. Securing Kubelet Communication
                                                                                                                                                                                                                                              1. TLS for Kubelet API
                                                                                                                                                                                                                                                1. Certificate Configuration
                                                                                                                                                                                                                                                  1. TLS Version Requirements
                                                                                                                                                                                                                                                    1. Cipher Suite Selection
                                                                                                                                                                                                                                                    2. Node-to-Kubelet Authentication
                                                                                                                                                                                                                                                      1. Client Certificate Authentication
                                                                                                                                                                                                                                                        1. Token-based Authentication
                                                                                                                                                                                                                                                          1. Mutual TLS Configuration
                                                                                                                                                                                                                                                    3. Authentication, Authorization, and Admission Control
                                                                                                                                                                                                                                                      1. Authentication
                                                                                                                                                                                                                                                        1. X.509 Client Certificates
                                                                                                                                                                                                                                                          1. Certificate Issuance and Management
                                                                                                                                                                                                                                                            1. Certificate Authority Management
                                                                                                                                                                                                                                                              1. Certificate Request Processing
                                                                                                                                                                                                                                                                1. Certificate Lifecycle Management
                                                                                                                                                                                                                                                                2. Certificate Revocation
                                                                                                                                                                                                                                                                  1. Certificate Revocation Lists
                                                                                                                                                                                                                                                                    1. Online Certificate Status Protocol
                                                                                                                                                                                                                                                                      1. Certificate Blacklisting
                                                                                                                                                                                                                                                                    2. Static Token Files
                                                                                                                                                                                                                                                                      1. Token Generation and Storage
                                                                                                                                                                                                                                                                        1. Secure Token Generation
                                                                                                                                                                                                                                                                          1. Token File Security
                                                                                                                                                                                                                                                                            1. Token Distribution
                                                                                                                                                                                                                                                                          2. Bootstrap Tokens
                                                                                                                                                                                                                                                                            1. Token Lifecycle Management
                                                                                                                                                                                                                                                                              1. Token Creation
                                                                                                                                                                                                                                                                                1. Token Expiration
                                                                                                                                                                                                                                                                                  1. Token Cleanup
                                                                                                                                                                                                                                                                                2. Service Account Tokens
                                                                                                                                                                                                                                                                                  1. Token Mounting and Usage
                                                                                                                                                                                                                                                                                    1. Automatic Token Mounting
                                                                                                                                                                                                                                                                                      1. Manual Token Management
                                                                                                                                                                                                                                                                                        1. Token Projection
                                                                                                                                                                                                                                                                                        2. Token Expiry and Rotation
                                                                                                                                                                                                                                                                                          1. Token Lifetime Configuration
                                                                                                                                                                                                                                                                                            1. Automatic Token Rotation
                                                                                                                                                                                                                                                                                              1. Token Refresh Mechanisms
                                                                                                                                                                                                                                                                                            2. OpenID Connect Tokens
                                                                                                                                                                                                                                                                                              1. OIDC Provider Integration
                                                                                                                                                                                                                                                                                                1. Provider Configuration
                                                                                                                                                                                                                                                                                                  1. Discovery Endpoint Setup
                                                                                                                                                                                                                                                                                                    1. Issuer Validation
                                                                                                                                                                                                                                                                                                    2. OIDC Claims and Scopes
                                                                                                                                                                                                                                                                                                      1. Standard Claims Processing
                                                                                                                                                                                                                                                                                                        1. Custom Claims Mapping
                                                                                                                                                                                                                                                                                                          1. Scope-based Authorization
                                                                                                                                                                                                                                                                                                        2. Webhook Token Authentication
                                                                                                                                                                                                                                                                                                          1. Webhook Endpoint Security
                                                                                                                                                                                                                                                                                                            1. Webhook TLS Configuration
                                                                                                                                                                                                                                                                                                              1. Webhook Authentication
                                                                                                                                                                                                                                                                                                                1. Webhook Authorization
                                                                                                                                                                                                                                                                                                            2. Authorization
                                                                                                                                                                                                                                                                                                              1. Role-Based Access Control
                                                                                                                                                                                                                                                                                                                1. Roles and ClusterRoles
                                                                                                                                                                                                                                                                                                                  1. Defining Permissions
                                                                                                                                                                                                                                                                                                                    1. Resource-based Permissions
                                                                                                                                                                                                                                                                                                                      1. Verb-based Permissions
                                                                                                                                                                                                                                                                                                                        1. API Group Permissions
                                                                                                                                                                                                                                                                                                                        2. Scoping Access
                                                                                                                                                                                                                                                                                                                          1. Namespace-scoped Roles
                                                                                                                                                                                                                                                                                                                            1. Cluster-scoped Roles
                                                                                                                                                                                                                                                                                                                              1. Resource Name Restrictions
                                                                                                                                                                                                                                                                                                                            2. RoleBindings and ClusterRoleBindings
                                                                                                                                                                                                                                                                                                                              1. Binding Users and Groups
                                                                                                                                                                                                                                                                                                                                1. User-to-Role Bindings
                                                                                                                                                                                                                                                                                                                                  1. Group-to-Role Bindings
                                                                                                                                                                                                                                                                                                                                    1. Service Account Bindings
                                                                                                                                                                                                                                                                                                                                    2. Namespace vs Cluster Scope
                                                                                                                                                                                                                                                                                                                                      1. Namespace-level Bindings
                                                                                                                                                                                                                                                                                                                                        1. Cluster-level Bindings
                                                                                                                                                                                                                                                                                                                                          1. Cross-namespace Access
                                                                                                                                                                                                                                                                                                                                        2. Service Accounts and RBAC
                                                                                                                                                                                                                                                                                                                                          1. Assigning Roles to Service Accounts
                                                                                                                                                                                                                                                                                                                                            1. Default Service Account Roles
                                                                                                                                                                                                                                                                                                                                              1. Custom Service Account Roles
                                                                                                                                                                                                                                                                                                                                                1. Service Account Isolation
                                                                                                                                                                                                                                                                                                                                              2. Best Practices for RBAC Policies
                                                                                                                                                                                                                                                                                                                                                1. Principle of Least Privilege
                                                                                                                                                                                                                                                                                                                                                  1. Minimal Permission Sets
                                                                                                                                                                                                                                                                                                                                                    1. Regular Permission Reviews
                                                                                                                                                                                                                                                                                                                                                      1. Permission Justification
                                                                                                                                                                                                                                                                                                                                                      2. Regular Policy Audits
                                                                                                                                                                                                                                                                                                                                                        1. Access Review Processes
                                                                                                                                                                                                                                                                                                                                                          1. Unused Permission Cleanup
                                                                                                                                                                                                                                                                                                                                                            1. Policy Effectiveness Assessment
                                                                                                                                                                                                                                                                                                                                                        2. Attribute-Based Access Control
                                                                                                                                                                                                                                                                                                                                                          1. Policy File Management
                                                                                                                                                                                                                                                                                                                                                            1. Policy File Structure
                                                                                                                                                                                                                                                                                                                                                              1. Policy File Security
                                                                                                                                                                                                                                                                                                                                                                1. Policy File Updates
                                                                                                                                                                                                                                                                                                                                                                2. Use Cases and Limitations
                                                                                                                                                                                                                                                                                                                                                                  1. ABAC vs RBAC Comparison
                                                                                                                                                                                                                                                                                                                                                                    1. Complex Authorization Scenarios
                                                                                                                                                                                                                                                                                                                                                                      1. Performance Considerations
                                                                                                                                                                                                                                                                                                                                                                    2. Node Authorization
                                                                                                                                                                                                                                                                                                                                                                      1. Node Identity Management
                                                                                                                                                                                                                                                                                                                                                                        1. Node Certificate Management
                                                                                                                                                                                                                                                                                                                                                                          1. Node Registration Process
                                                                                                                                                                                                                                                                                                                                                                            1. Node Identity Verification
                                                                                                                                                                                                                                                                                                                                                                            2. Node-specific Permissions
                                                                                                                                                                                                                                                                                                                                                                              1. Pod Management Permissions
                                                                                                                                                                                                                                                                                                                                                                                1. Secret Access Permissions
                                                                                                                                                                                                                                                                                                                                                                                  1. ConfigMap Access Permissions
                                                                                                                                                                                                                                                                                                                                                                                2. Webhook Authorization
                                                                                                                                                                                                                                                                                                                                                                                  1. Custom Authorization Logic
                                                                                                                                                                                                                                                                                                                                                                                    1. Authorization Decision Implementation
                                                                                                                                                                                                                                                                                                                                                                                      1. External System Integration
                                                                                                                                                                                                                                                                                                                                                                                        1. Policy Engine Integration
                                                                                                                                                                                                                                                                                                                                                                                        2. Webhook Endpoint Security
                                                                                                                                                                                                                                                                                                                                                                                          1. Webhook Authentication
                                                                                                                                                                                                                                                                                                                                                                                            1. Webhook TLS Configuration
                                                                                                                                                                                                                                                                                                                                                                                              1. Webhook Performance Optimization
                                                                                                                                                                                                                                                                                                                                                                                          2. Admission Control
                                                                                                                                                                                                                                                                                                                                                                                            1. Understanding Admission Controllers
                                                                                                                                                                                                                                                                                                                                                                                              1. Validating vs Mutating Controllers
                                                                                                                                                                                                                                                                                                                                                                                                1. Validation Logic Implementation
                                                                                                                                                                                                                                                                                                                                                                                                  1. Mutation Logic Implementation
                                                                                                                                                                                                                                                                                                                                                                                                    1. Controller Interaction
                                                                                                                                                                                                                                                                                                                                                                                                    2. Admission Controller Lifecycle
                                                                                                                                                                                                                                                                                                                                                                                                      1. Controller Registration
                                                                                                                                                                                                                                                                                                                                                                                                        1. Controller Execution Order
                                                                                                                                                                                                                                                                                                                                                                                                          1. Controller Error Handling
                                                                                                                                                                                                                                                                                                                                                                                                        2. Enabling and Disabling Controllers
                                                                                                                                                                                                                                                                                                                                                                                                          1. Controller Configuration
                                                                                                                                                                                                                                                                                                                                                                                                            1. Built-in Controller Management
                                                                                                                                                                                                                                                                                                                                                                                                              1. Controller Parameter Configuration
                                                                                                                                                                                                                                                                                                                                                                                                                1. Controller Dependencies
                                                                                                                                                                                                                                                                                                                                                                                                                2. Controller Ordering
                                                                                                                                                                                                                                                                                                                                                                                                                  1. Execution Sequence
                                                                                                                                                                                                                                                                                                                                                                                                                    1. Priority Management
                                                                                                                                                                                                                                                                                                                                                                                                                      1. Dependency Resolution
                                                                                                                                                                                                                                                                                                                                                                                                                    2. Validating Admission Webhooks
                                                                                                                                                                                                                                                                                                                                                                                                                      1. Webhook Registration
                                                                                                                                                                                                                                                                                                                                                                                                                        1. ValidatingAdmissionWebhook Configuration
                                                                                                                                                                                                                                                                                                                                                                                                                          1. Webhook Endpoint Registration
                                                                                                                                                                                                                                                                                                                                                                                                                            1. Webhook Lifecycle Management
                                                                                                                                                                                                                                                                                                                                                                                                                            2. Security of Webhook Endpoints
                                                                                                                                                                                                                                                                                                                                                                                                                              1. Webhook Authentication
                                                                                                                                                                                                                                                                                                                                                                                                                                1. Webhook Authorization
                                                                                                                                                                                                                                                                                                                                                                                                                                  1. Webhook TLS Configuration
                                                                                                                                                                                                                                                                                                                                                                                                                                2. Mutating Admission Webhooks
                                                                                                                                                                                                                                                                                                                                                                                                                                  1. Mutation Use Cases
                                                                                                                                                                                                                                                                                                                                                                                                                                    1. Resource Modification Scenarios
                                                                                                                                                                                                                                                                                                                                                                                                                                      1. Security Enhancement Mutations
                                                                                                                                                                                                                                                                                                                                                                                                                                        1. Compliance Enforcement Mutations
                                                                                                                                                                                                                                                                                                                                                                                                                                        2. Security Considerations
                                                                                                                                                                                                                                                                                                                                                                                                                                          1. Mutation Validation
                                                                                                                                                                                                                                                                                                                                                                                                                                            1. Mutation Audit Logging
                                                                                                                                                                                                                                                                                                                                                                                                                                              1. Mutation Rollback Procedures
                                                                                                                                                                                                                                                                                                                                                                                                                                            2. Pod Security Standards
                                                                                                                                                                                                                                                                                                                                                                                                                                              1. Baseline Security Level
                                                                                                                                                                                                                                                                                                                                                                                                                                                1. Baseline Policy Requirements
                                                                                                                                                                                                                                                                                                                                                                                                                                                  1. Baseline Compliance Checking
                                                                                                                                                                                                                                                                                                                                                                                                                                                    1. Baseline Violation Handling
                                                                                                                                                                                                                                                                                                                                                                                                                                                    2. Restricted Security Level
                                                                                                                                                                                                                                                                                                                                                                                                                                                      1. Restricted Policy Requirements
                                                                                                                                                                                                                                                                                                                                                                                                                                                        1. Restricted Compliance Checking
                                                                                                                                                                                                                                                                                                                                                                                                                                                          1. Restricted Violation Handling
                                                                                                                                                                                                                                                                                                                                                                                                                                                          2. Privileged Security Level
                                                                                                                                                                                                                                                                                                                                                                                                                                                            1. Privileged Access Requirements
                                                                                                                                                                                                                                                                                                                                                                                                                                                              1. Privileged Use Case Justification
                                                                                                                                                                                                                                                                                                                                                                                                                                                                1. Privileged Access Monitoring
                                                                                                                                                                                                                                                                                                                                                                                                                                                              2. Pod Security Admission
                                                                                                                                                                                                                                                                                                                                                                                                                                                                1. Enabling PSA
                                                                                                                                                                                                                                                                                                                                                                                                                                                                  1. PSA Configuration
                                                                                                                                                                                                                                                                                                                                                                                                                                                                    1. Namespace-level PSA
                                                                                                                                                                                                                                                                                                                                                                                                                                                                      1. Cluster-level PSA
                                                                                                                                                                                                                                                                                                                                                                                                                                                                      2. Policy Enforcement Modes
                                                                                                                                                                                                                                                                                                                                                                                                                                                                        1. Enforce Mode
                                                                                                                                                                                                                                                                                                                                                                                                                                                                          1. Audit Mode
                                                                                                                                                                                                                                                                                                                                                                                                                                                                            1. Warn Mode
                                                                                                                                                                                                                                                                                                                                                                                                                                                                          2. PodSecurityPolicy Deprecation
                                                                                                                                                                                                                                                                                                                                                                                                                                                                            1. Migration Strategies
                                                                                                                                                                                                                                                                                                                                                                                                                                                                              1. PSP to PSS Migration
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                1. Third-party Policy Engine Migration
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  1. Custom Admission Controller Migration
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  2. Alternatives to PSP
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    1. Open Policy Agent Gatekeeper
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      1. Kyverno
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        1. Falco
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  3. Kubernetes Network Security
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    1. Network Policies
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      1. Ingress and Egress Rules
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        1. Defining Allowed Traffic
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          1. Protocol-based Rules
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            1. Port-based Rules
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              1. IP-based Rules
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              2. Policy Enforcement
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                1. CNI Plugin Requirements
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  1. Policy Validation
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    1. Policy Troubleshooting
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  2. Selecting Pods
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    1. Label-based Selection
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      1. Label Selector Syntax
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        1. Dynamic Label Selection
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          1. Label Management Best Practices
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          2. Namespace-based Selection
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            1. Namespace Selector Configuration
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              1. Cross-namespace Communication
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                1. Namespace Isolation Strategies
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              2. Namespace Isolation
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                1. Isolating Sensitive Workloads
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  1. Multi-tenancy Isolation
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    1. Environment Separation
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      1. Compliance-driven Isolation
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    2. Default Deny Policies
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      1. Implementing Default Deny
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        1. Cluster-wide Default Deny
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          1. Namespace-level Default Deny
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            1. Selective Default Deny
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            2. Exceptions and Overrides
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              1. Emergency Access Procedures
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                1. Temporary Policy Overrides
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  1. Exception Approval Processes
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              2. Securing Cluster Networking
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                1. Container Network Interface Security
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  1. CNI Plugin Hardening
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    1. Plugin Configuration Security
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      1. Plugin Update Management
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        1. Plugin Vulnerability Management
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        2. CNI Configuration Management
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          1. Configuration File Security
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            1. Configuration Validation
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              1. Configuration Change Control
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            2. Encrypting Inter-Node Traffic
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              1. WireGuard Implementation
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                1. WireGuard Configuration
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  1. Key Management for WireGuard
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    1. WireGuard Performance Optimization
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    2. IPsec Implementation
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      1. IPsec Configuration
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        1. IPsec Key Management
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          1. IPsec Troubleshooting
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          2. Key Management for Encryption
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            1. Key Generation and Distribution
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              1. Key Rotation Procedures
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                1. Key Storage Security
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              2. DNS Security
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                1. Securing CoreDNS
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  1. CoreDNS Configuration Hardening
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    1. CoreDNS Plugin Security
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      1. CoreDNS Access Controls
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      2. Preventing DNS Spoofing
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        1. DNS Response Validation
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          1. DNS over TLS Configuration
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            1. DNS Filtering and Blocking
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        2. Service Mesh for Security
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          1. Mutual TLS for Service-to-Service Encryption
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            1. Certificate Management in Service Mesh
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              1. Automatic Certificate Provisioning
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                1. Certificate Rotation in Service Mesh
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  1. Certificate Validation
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                2. Fine-grained Access Policies
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  1. Service-to-Service Authorization
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    1. Identity-based Authorization
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      1. Request-based Authorization
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        1. Context-aware Authorization
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      2. Traffic Monitoring and Auditing
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        1. Service Mesh Telemetry
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          1. Metrics Collection
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            1. Distributed Tracing
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              1. Access Logging
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              2. Detecting Anomalous Traffic
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                1. Traffic Pattern Analysis
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  1. Anomaly Detection Algorithms
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    1. Automated Response Mechanisms

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            Previous

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            2. Cloud and Infrastructure Security

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            Go to top

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            Next

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            4. Container Security