Troubleshooting Linux® Firewalls

Chapter 1. Introduction

Why We Wrote This Book

There are a lot of security books—books about risk management, cryptography, cracking, hacking, and writing better software, along with many firewall “cookbooks” and “bibles.” We wrote this book because there are not many books out there that focus specifically on what to do when something goes wrong with your firewall or that explain how to fix errant firewalls. We wanted to put together a book that would combine the practical elements of fixing specific and common problems with Linux firewalls, along with how to figure out what might be causing a problem we might not have foreseen when we set out to write this book. In our exploration, we found that there was no book that did these things. Nothing ...