Firewalls

  1. Fundamental Firewall Concepts
    1. Network Boundaries and Trust Zones
      1. Trusted Networks
        1. Untrusted Networks
          1. Semi-Trusted Networks
            1. Perimeter Definition
              1. Network Zoning Strategies
              2. Network Traffic Fundamentals
                1. Data Packet Structure
                  1. Headers
                    1. Payload
                      1. Checksums
                      2. Packet Flow in Networks
                        1. Routing Concepts
                          1. Switching Concepts
                            1. Network Topology Impact
                          2. Network Protocols and Ports
                            1. Port Numbers and Services
                              1. Well-Known Ports
                                1. Registered Ports
                                  1. Dynamic Ports
                                  2. Transmission Control Protocol
                                    1. Connection-Oriented Communication
                                      1. Three-Way Handshake
                                        1. Connection Termination
                                          1. Flow Control
                                          2. User Datagram Protocol
                                            1. Connectionless Communication
                                              1. Use Cases and Applications
                                                1. Performance Characteristics
                                                2. Internet Control Message Protocol
                                                  1. Network Diagnostics
                                                    1. Error Reporting
                                                      1. Ping and Traceroute
                                                      2. Other Important Protocols
                                                        1. HTTP and HTTPS
                                                          1. FTP and SFTP
                                                            1. DNS
                                                              1. SMTP
                                                            2. IP Addressing and Subnetting
                                                              1. IPv4 Addressing
                                                                1. Address Classes
                                                                  1. Private Address Ranges
                                                                    1. Public Address Ranges
                                                                    2. IPv6 Addressing
                                                                      1. Address Format
                                                                        1. Address Types
                                                                          1. Transition Mechanisms
                                                                          2. Subnetting Concepts
                                                                            1. Subnet Masks
                                                                              1. CIDR Notation
                                                                                1. Variable Length Subnet Masking
                                                                              2. Security Policies and Rule Management
                                                                                1. Security Policy Development
                                                                                  1. Rule Set Components
                                                                                    1. Policy Hierarchy
                                                                                      1. Policy Enforcement Mechanisms

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                                                                                    1. Introduction to Network Security and Firewalls

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                                                                                    3. Types of Firewalls by Filtering Method