I recently got brickhouse (for those of you who don't know what it is http://www.free-firewall.org/mac-download.asp) it's basicly a gui for editing the firewall in unix wich comes with Mac Os X. I was wondering wich ports You should leave open and wich ports should remain closed? I'm aware that theres a vast number of ports but I'm only intrested in the most important ones I guess my question is how do I set up A FIREWALL so that it works properly? I've allready locked down most of the incoming trafic.

I hope someone may be able to help me out with this.

I'm relativley new to the security scene so all help will be appreciated!