I'm trying to use the built-in firewall in OS X but I have a some questions. I'm used to just loading up ZoneAlarm on my PC, so I need some help with this. My main concern is security in regards to p2p. I use a variety of p2p programs (along with IRC) and I'd like to still use these, but be protected at the same time. Is that possible using just the built-in firewall in Panther? If so - what would I do to set it up correctly? In my system prefs there are nine boxes to check there, and I don't know which ones to choose. If not - what products would you recommend? Thanks very much!