"The IPCop project is a GNU/GPL project that offers an
exceptional feature packed stand alone firewall to the internet
community. Its comprehensive web interface, well documented
administration guides, and its involved and helpful
user/administrative mailing lists make users of any technical
capacity feel at home. It goes far beyond a simple ipchains /
netfilter implementation available in most Linux distributions and
even the firewall feature sets of commercial competitors.
"Firewalls have had to undergo a tremendous metamorphosis as a
result of evolving threats. IPCop is exemplary in offering such a
range of default features and even further a large set of optional
plug-ins which can provide further functionality..."