>>>Of course not, I use the Windows XP built-in firewall. ;-)
>>
>>What do you think of Steve Gibson's claims?
>
>What claims would those be? I really haven't evaluated the XP firewall yet (just installed it a few days ago on the home box), and I have my doubts as to how robust it is. For now it's a stop-gap until I can get ISA installed.

His stuff doesn't refer to the XP Firewall, but rather XPs use of raw sockets.

http://grc.com/dos/xplaughter.htm
http://grc.com/dos/xpconference.htm