Linux iptables HOWTO

Rusty Russell, mailing list netfilter@lists.samba.org

1. Introduction

2. Where is the official Web Site and List?

3. What Is Packet Filtering?

• 3.1 Networking (Very) Basics
• 3.2 So What's A Packet Filter?
• 3.3 Why Would I Want to Packet Filter?
• 3.4 How Do I Packet Filter Under Linux?

4. Who the hell are you, and why are you playing with my kernel?

5. How Packets Traverse The Filters

6. Using iptables

• 6.1 What You'll See When Your Computer Starts Up
• 6.2 Operations on a Single Rule
• 6.3 Filtering Specifications
• 6.4 Target Specifications
• 6.5 Operations on an Entire Chain

7. Differences Between iptables and ipchains