Livermore Software Laboratories, Intl.
Computers, Security, Firewalls, Products - Livermore Software Laboratores, Intl.. Providing the PORTUS products for over ten years with a perfect security record.
http://lsli.com
Bill Stearns' web site
Computers, Security, Firewalls, Products - Firewall Scripts. Contains a collection of useful scripts for the management, rules setting and conversion, and other related topics referencing open source firewall offerings.
http://www.stearns.org
Firestarter Linux Firewall
Computers, Security, Firewalls, Products - Firestarter Linux Firewall. A graphical interfaced Open Source firewall for Linux.
https://www.fs-security.com/
The netfilter/iptables Project
Computers, Security, Firewalls, Products - The netfilter/iptables Project. Netfilter and iptables are building blocks of a framework inside the Linux 2.
https://www.netfilter.org/
Simple OpenBSD Firewall Interface
Computers, Security, Firewalls, Products - Simple OpenBSD Firewall Interface. complete firewall solution for OpenBSD with many features, all of which are accessible through a web interface.
https://sofi-firewall.sourceforge.net/