Smoothwall

SmoothWall Express is an open source firewall distribution based on the GNU/Linux operating system.

Linux is the ideal choice for security systems; it is well proven, secure, highly configurable and freely available as open source code.

SmoothWall includes a hardened subset of the GNU/Linux operating system, so you don't have to install any separate OS.

Designed for ease of use, SmoothWall is configured via a web-based GUI, and requires absolutely no knowledge of Linux to install or use.