I assume the filters bounce what they are configured to bounce. Are you looking for descriptions of filtering schemes that people have used and some statistics on what happened? JT ======================================================================= Huh? I've been on firewalls since about a month after it started... thanx for the thought, though ... firewalls hasn't really discussed what kinds of stuff have "bounced off the outer walls" much either, maybe everyone considers how they get attacked a secret. _H*