Everything you need to know about the Leopard firewall

TidBITS Safe Computing: Leopard Firewall Takes One Step Forward, Three Steps Back.

Rich Mogul writing for TidBits explains why the new Firewall in Leopard isn’t as good as the old one, even though it adds application-level support for control over outgoing traffic. This is also a good explanation of why keeping the source of a security product closed (as Apple has done with its new firewall) isn’t a good idea.