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Chapter 10. Testing Your Firewall Rules (for Security!) Chapter 11. Layer 2/Inline Filtering Chapter 12. NAT (Network Address Translation) and IP Forwarding Chapter 13. General IP (Layer 3/Layer 4) Chapter 14. SMTP (e-mail) Chapter 15. Web Services (Web Servers and Web Proxies) Chapter 16. File Services (NFS and FTP) Chapter 17. Instant Messaging Chapter 18. DNS/DHCP Chapter 19. Virtual Private Networks |
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