Hello there I'm a recent Mac convert, but coming from Windows there's still a couple of things I'm not sure about, and would be grateful for some advice. One of the things I could do on Windows (XP) with Kerio Firewall was to block internet traffic and allow applications outbound access explicitly. Very useful to have the firewall notify you when some new app is trying to access the internet and get you to confirm or deny this. Can anyone tell me if the built-in firewall does this, or if there are any third-party apps that can ? I'd really like to keep that granular level of control if possible. Many thanks for any advice/tips etc.