Quarantine is yet another firewall that has masquerade, TOS, and traffic shaping features. It has a lot of options, but is quite easy to configure. It was formerly known as Netwall.
Information regarding Project Releases and Project Resources. Note that the information here is a quote from Freecode.com page, and the downloads themselves may not be hosted on OSDN.
This release includes fixes for a few problems with qconfig, updates and additions to the modules for incoming CVS, DNS zone transfers, and DNS queries, and some other minor bugfixes.