Introduction

This document covers many aspects of installing and managing ECSC Linux based firewalls including, but probably not entirely limited to:

• Configuring Squid (Web proxy);

• Configuring Qmail (Mail system);

• Configuring Apache (Web server);

• Configuring FreeSWAN based IPSEC VPNs;

• Configuring Netfilter using SgtBash;

• Configuring PPTP based VPNs;

• Configuring PPP Dial-In Access;

• Writing firewall policies;

• Troubleshooting problems;

• Auditing of configuration.

As many (read: all) of the packages that make up an ECSC firewall are open-source and freely available this document will only cover specific firewall related details, plus anything helpful to troubleshooting. It is not designed to be a beginners guide and so expects the reader to have a good understanding of the underlying technology. Wherever possible other documentation will be referenced; we suggest you indulge in further reading.

This document may also cover peripheral systems, such as Microsoft Windows, Macromedia Coldfusion and Sophos Anti-virus with regard to making them operate smoothly alongside, or with, ECSC firewalls.