ProxyList.com

Bandwidth Management and Firewall
A tool that limits network bandwidth for some computers, subnets or some network service, and monitors network traffic to see how much data was transferred to some computer, subnet or how much data was transferred by some network service. [Windows 2000/XP/2003]
www.softinengines.com/

Firewall Comparison: Checkpoint Firewall-1 and Cisco PIX
One consulting firm's views on setup, licensing, tech support, 3rd party modules, platform dependence, documentation, logging and pricing.
www.roble.com/

How to Bypass Most Firewall Restrictions and Access the Internet Privately, a.k.a. The Surf At Work Page
This guide discusses a way an employee or student can securely access the Internet while at work or school, and also get around some common firewall restrictions that prevent using most networked programs.
www.buzzsurf.com/

Using Term to Pierce an Internet Firewall
Tutorial on using 'term' to do network stuff through a TCP firewall that you're not supposed to be able to, by Barak Pearlmutter.
en.tldp.org/

Firewall Test and Port Scan at AUDITMYPC
This online security audit is free, extremely fast and provides immediate results designed to promote security awareness.
www.auditmypc.com/

Setting up sendmail on a firewall, Part 1
This article discusses the implementation of sendmail on the firewall and focuses on features new to sendmail 8.9.3.
www.sunworld.com/

Setting up sendmail on a firewall, Part 3
This final article in the series covers installation, optional features, and testing techniques. An example of configurations for a special situation is described.
www.sunworld.com/

Setting up sendmail on a firewall, Part 2
This article covers the intricacies of sendmail configuration file and shows you how to generate, build, and test a config file for your firewall.
www.sunworld.com/

Free Windows Firewall Downloads
Attempts to list all free firewall software downloads on the Internet for the Windows Operating system.
www.iopus.com/

China: The Great Firewall
"The weekend attacks added to the growing number of acts of hacktivism, in which political activists have used information warfare to protest China's stranglehold on free speech." [Wired]
www.wired.com/