1. Network Firewalls2. Firewall Security Policies3. A Simple Mathematical Model for Policies, Rules, and Packets4. First-match Firewall Policy Anomalies5. Policy Optimization6. Firewall Types7. Host and Network Firewalls8. Software and Hardware Firewall Implementations9. Choosing the Correct Firewall10. Firewall Placement and Network Topology11. Firewall Installation and Configuration12. Supporting Outgoing Services Through Firewall Configuration13. Secure External Services Provisioning14. Network Firewalls for Voice and Video Applications15. Firewalls and Important Administrative Service Protocols16. Internal IP Services Protection17. Firewall Remote Access Configuration18. Load Balancing and Firewall Arrays19. Highly Available Firewalls20. Firewall Management21. Conclusion