Resources

http://www.crpht.lu/CNS/html/PubServ/Security/index.html
http://www.access.digex.net/~bdboyle/firewall.vendor.html
PCWeek Article June 19, 1995
http://www.GreatCircle.com/
MAJORDOMO: firewalls-digest@GreatCircle.com
news: comp.security.firewalls
Firewalls and Internet Security: Repelling the Wily Hacker. [Cheswick, William R. and Bellovin, Steven M.; Addison Wesley,1994.]
Building Internet Firewalls [D. Brent Chapman and Elizabeth D. Zwicky, O'Reilly & Associates, September 1995, 517 Pages, ISBN 1-56592-124-0 ]