only stops traffic from coming in.
Try a program called "Little Snitch" which tell you, and ask, for access to the internet.
Norton makes a firewall for Mac.
Is there a way to configure the firewall in my tiger system to block specific programs from sending information? I hate it that all my software can access the internet behind my back and would prefer a dialogue pop-up to ask permission. Is there software I could use to add this option - like zonealarm for pc?