Hi guys Interesting thread... Could some of you elaborate a bit on the notion of 'layer defense fw'? If I understood correctly, WXPFirewall is a level 3 and 4 layer fw, right? How about the others? Do you know which firewalls offer level 2 and/or 1 filtering? How about Kerio 2.15 (a dinosaur, but still very often used) and OutpostPro? Thanks for comments and answers... Sorry to be so ignorant on the subject.