IT Security - The Essential Guide to Firewalls
The IT Security website is an excellent resource for researching corporate security needs and best practices. The articles below describe options and best practices for corporate firewall implementations.
http://www.itsecurity.com/features/essential-guide-firewalls-061208/
QUOTE: Firewalls play a central role in IT security, standing between enterprise networks and the outside world to protect computers, applications and other resources from external attack.
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5 Firewall Tests and Supporting Tools
Firewall Comparison Guide
3 Tips For Deploying a Firewall
10 Tips to Make Sure Your Firewall is Really Secure