routing, port mapping, internet sharing etc etc



i'm running os x. (os x server actually) and right now i use a program called brickhouse to handle my router configuration. but this program kind of sucks. i'd much rather learn how to configure these programs manually. by these programs, i mean the programs os x comes with to handle these jobs (natd, ipfw right?). i know brickhouse is basically just a gui front end for those. i'd like to be able to manually configure them. so i can ssh into the machine and add a port mapping if i need to, easily and quickly. i can't seem to find any good info on how to do this on the web, i don't know if i'm searching for the wrong thing or what. but if someone wants to walk me through setting something like this up, it would be really appreciated. thanks.