Untangle - Linux-based network gateway with pluggable modules for network applications

Untangle is a Linux-based network gateway with pluggable modules for network applications like spam blocking, web filtering, anti-virus, anti-spyware, intrusion prevention, VPN, SSL VPN, firewall, and more. Visit http://untangle.com

Download untangle_932_x32.iso (430.6 MB)
Download other versions from here

Source-
http://www.untangle.com/
http://sourceforge.net/projects/untangle/

Screenshot-