[jay3ld]

The mac os x i am running has a built in firewall to block TPC ports. but i need to be blocking UDP ports also.

any way to do this? or a program to do it.

[Ω]

I think you can do it via the Sharing pref Firewall tab where you can add new ports to block. I personally use NB which I think block all ports.

Or I could be wrong.

[jay3ld]

the macs built in one far as i can tell only blocks the TPC

[Millennium]

Actually, the built-in firewall of OSX is quite powerful. The problem is that Apple's interface to it is very poor; you can't use it to configure most of the stuff that it allows. You might consider one of the third-party configuration utilities, such as BrickHouse, which use the built-in firewall code but do a much better job of configuring it to do what you want.