Attached Link: http://grc.com/default.htm

If you have Zone Alarm running your computer is in stealth mode - means it is not visible anymore to anyone trying to get access to your PC. Some firewalls (Norton included) will response to the port scanner but Zone Alarm will not. For more info or probing your ports I recomment Steve Gibson's site.

https://grc.com/x/ne.dll?bh0bkyd2 <- to probe your ports

http://grc.com/lt/leaktest.htm <- Leak test for your firewall (Zone Alarm is the only firewall that passes this test without problems)

Every organisation rests upon a mountain of secrets ~ Julian Assange