Book Image

Configuring IPCop Firewalls: Closing Borders with Open Source

Book Image

Configuring IPCop Firewalls: Closing Borders with Open Source

Overview of this book

IPCop is a powerful, open source, Linux based firewall distribution for primarily Small Office Or Home (SOHO) networks, although it can be used in larger networks. It provides most of the features that you would expect a modern firewall to have, and what is most important is that it sets this all up for you in a highly automated and simplified way. This book is an easy introduction to this popular application. After introducing and explaining the foundations of firewalling and networking and why they're important, the book moves on to cover using IPCop, from installing it, through configuring it, to more advanced features, such as configuring IPCop to work as an IDS, VPN and using it for bandwidth management. While providing necessary theoretical background, the book takes a practical approach, presenting sample configurations for home users, small businesses, and large businesses. The book contains plenty of illustrative examples.
Table of Contents (16 chapters)
Configuring IPCop Firewalls
Credits
About the Authors
About the Reviewers
Preface
7
Virtual Private Networks
11
IPCop Support

Altering IPCop Functionality


As with many aspects of the behavior of the IPCop firewall, it is possible to alter the behavior of the firewalling rules in order to customize IPCop to meet a topology un-catered for by the default rules. Within the context of the firewall rules, IPCop has had a file since the 1.4-series release that allows users to specifically add their own firewall rules (/etc/rc.d/rc.firewall.local). Since version 1.3, there have been iptables chains, CUSTOMINPUT, CUSTOMFORWARD, etc., allowing iptables rules to be added manually.

Specifically using iptables is out of our scope here, but we recommend that interested readers read:

The Linux iptables HOWTO at http://www.linuxguruz.com/iptables/howto/