Firewall and Proxy Server HOWTO

Mark Grennan, mark@grennan.com

1. Introduction

• 1.1 Feedback
• 1.2 Disclaimer
• 1.3 Copyright
• 1.4 My Reasons for Writing this
• 1.5 Further Readings

2. Understanding Firewalls

• 2.1 Firewall Politics
• 2.2 Types of Firewalls

3. Firewall Architecture

4. Setting up the Linux Filtering Firewall

• 4.1 Hardware requirements

5. Software requirements

• 5.1 Available packages

6. Preparing the Linux system

• 6.1 Compiling the Kernel
• 6.2 Configuring two network cards
• 6.3 Configuring the Network Addresses
• 6.4 Testing your network
• 6.5 Securing the Firewall

7. IP filtering setup (IPFWADM)

8. IP filtering setup (IPCHAINS)

9. Making it easy-er

10. Installing a Transparent SQUID proxy

11. Installing the TIS Proxy server

• 11.1 Getting the software
• 11.2 Compiling the TIS FWTK
• 11.3 Installing the TIS FWTK
• 11.4 Configuring the TIS FWTK

12. The SOCKS Proxy Server

• 12.1 Setting up the Proxy Server
• 12.2 Configuring the Proxy Server
• 12.3 Working With a Proxy Server
• 12.4 Drawbacks with Proxy Servers

13. Advanced Configurations

• 13.1 A large network with emphasis on security

14. Making Management Easy

15. Defeating a Proxy Firewall