Netdeep Cop is a secure network gateway. It
features stateful packet
filtering, proxies, antivirus/antispam, content
filtering, IDS/IPS, and
VPN. It was started with code from IPCop and
Smoothwall.
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.