I was on the hunt for some PIX firewall specification documents when I came across this article on the ISAServer.org website. Definitely worth a read if you want to learn more about ISA and some of the common quoted fallacies it often generates J

http://www.isaserver.org/articles/2004tales.html

It's clear that a number of commentators and industry analysts don't understand the nature of firewall security in the 21st century and still cling to the marketing material they've received in 1997 from the current leaders in the firewall space. The problem is that they do their readers a serious disservice, as the glorified "stateful packet filter" of yesteryear just can't stack up to a serious application layer aware firewall like ISA Server 2004. This article provides you with the fact ammo you need to beat down your clueless colleagues when they tell you their puppy dog packet filter is better than your ISA firewall