The P2Pwall project aims to provide tools and
documentation on using Linux "iptables" for
filtering traffic from peer-to-peer file sharing
applications such as Kazaa and others.
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.
The ability to block WinMX and OpenNAP P2P traffic
was added, based on the notion of "training" using
DNS wild card patterns. This software is currently
deemed "experimental".