Firewall Builder is one of the most powerful and user-friendly firewall creation utilities available for Linux.
Netzob's official website has been released and contains more updated informations. see http://www.netzob.org for more informations on Netzob.
Welcome to the IP Tables State homepage. IPTState is a top-like interface to your netfilter connection-tracking table. Using iptstate you interactively watch where traffic crossing your netfilter/iptables firewall is going, sort by various criteria, limit the view by various criteria.
This page is a small HOWTO about the advanced linux routing... First of all let me tell you where you can find the best source of information about the advanced routing under Linux.