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Linux 2.4 Packet Filtering HOWTO

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

$Revision: 1.2 $ $Date: 2002/02/19 11:33:43 $

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This document describes how to use iptables to filter out bad packets for the 2.4 Linux kernels.

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1. Introduction

2. Where is the official Web Site? Is there a Mailing List?

3. So What's A Packet Filter?

• 3.1 Why Would I Want to Packet Filter?
• 3.2 How Do I Packet Filter Under Linux?

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

5. Rusty's Really Quick Guide To Packet Filtering

6. How Packets Traverse The Filters

7. Using iptables

• 7.1 What You'll See When Your Computer Starts Up
• 7.2 Operations on a Single Rule
• 7.3 Filtering Specifications
• 7.4 Target Specifications
• 7.5 Operations on an Entire Chain

8. Using ipchains and ipfwadm

9. Mixing NAT and Packet Filtering

10. Differences Between iptables and ipchains

11. Advice on Packet Filter Design

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