Port holes in a firewall

What are the port holes for the firewall, i cant create a server on esf and i want to 4 me and my friends, but they never appear, im on 512k and have what i thought was a port hole open, how do i fix this

go to www.kerio.com and download there nifty software firewall.

be sure you use this firewall before the other firewall.. now it will shout out violently which program uses which port (or wants to).

note them down (and delete kerio if ya don't need it)