IDS systems...well mostly easy to bypass but they keep the script kiddies away... I've tried ZoneAlarm but the little popup-boxes really pisses me off... it's hard to secure a box if u often install new software/games that needs access to the Net... Symantec Internet security 2002 is ok, and it should keep most morons away... (u could of course just install *nix on ur box and use some of the buildin firewall services hehe )