Nmap and Network Scanning

  1. Defensive Countermeasures
    1. Scan Detection Methods
      1. Intrusion Detection Systems
        1. Signature-Based Detection
          1. Known Scan Patterns
            1. Port Scan Signatures
            2. Anomaly-Based Detection
              1. Traffic Pattern Analysis
                1. Behavioral Baselines
                2. Hybrid Detection Systems
                3. Intrusion Prevention Systems
                  1. Real-Time Blocking
                    1. Automated Response
                      1. Rate Limiting
                      2. Log Analysis
                        1. Firewall Logs
                          1. Connection Attempts
                            1. Blocked Traffic
                            2. Server Logs
                              1. Access Patterns
                                1. Error Messages
                                2. Network Device Logs
                                  1. Router Logs
                                    1. Switch Logs
                                3. Detection Tools and Technologies
                                  1. Snort
                                    1. Rule Configuration
                                      1. Scan Detection Rules
                                        1. Alert Management
                                        2. Suricata
                                          1. Multi-Threading
                                            1. Protocol Analysis
                                              1. Event Correlation
                                              2. Wireshark
                                                1. Packet Capture
                                                  1. Traffic Analysis
                                                    1. Protocol Dissection
                                                    2. OSSEC
                                                      1. Host-Based Detection
                                                        1. Log Monitoring
                                                          1. File Integrity Monitoring
                                                          2. Commercial Solutions
                                                            1. Enterprise IDS/IPS
                                                              1. SIEM Systems
                                                                1. Network Monitoring Tools
                                                              2. Hardening Against Scans
                                                                1. Firewall Configuration
                                                                  1. Default Deny Policies
                                                                    1. Stateful Inspection
                                                                      1. Rate Limiting Rules
                                                                        1. Geo-Blocking
                                                                        2. Network Segmentation
                                                                          1. VLAN Implementation
                                                                            1. Access Control Lists
                                                                              1. Micro-Segmentation
                                                                              2. Service Hardening
                                                                                1. Unnecessary Service Removal
                                                                                  1. Service Configuration
                                                                                    1. Access Restrictions
                                                                                    2. Port Knocking
                                                                                      1. Hidden Service Access
                                                                                        1. Sequence-Based Authentication
                                                                                          1. Implementation Strategies
                                                                                          2. Honeypots and Deception
                                                                                            1. Fake Services
                                                                                              1. Scan Detection
                                                                                                1. Attacker Tracking
                                                                                              2. Proactive Defense Strategies
                                                                                                1. Continuous Monitoring
                                                                                                  1. Real-Time Analysis
                                                                                                    1. Automated Alerting
                                                                                                      1. Threat Intelligence Integration
                                                                                                      2. Threat Hunting
                                                                                                        1. Proactive Investigation
                                                                                                          1. Indicator Searching
                                                                                                            1. Behavioral Analysis
                                                                                                            2. Security Orchestration
                                                                                                              1. Automated Response
                                                                                                                1. Playbook Execution
                                                                                                                  1. Incident Coordination
                                                                                                                2. Using Nmap for Defense
                                                                                                                  1. Security Validation
                                                                                                                    1. Firewall Rule Testing
                                                                                                                      1. Access Control Verification
                                                                                                                        1. Service Exposure Assessment
                                                                                                                        2. Compliance Auditing
                                                                                                                          1. Policy Enforcement
                                                                                                                            1. Regulatory Requirements
                                                                                                                              1. Documentation Standards
                                                                                                                              2. Asset Management
                                                                                                                                1. Network Inventory
                                                                                                                                  1. Service Cataloging
                                                                                                                                    1. Change Detection
                                                                                                                                    2. Vulnerability Management
                                                                                                                                      1. Exposure Assessment
                                                                                                                                        1. Risk Prioritization
                                                                                                                                          1. Remediation Validation
                                                                                                                                          2. Incident Response
                                                                                                                                            1. Network Reconnaissance
                                                                                                                                              1. Compromise Assessment
                                                                                                                                                1. Forensic Analysis

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                                                                                                                                            13. Practical Scanning Scenarios

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                                                                                                                                            1. Fundamentals of Network Communication