Configuring for IP ports

[Rem P Roberti]

Hi Everyone,

A BSD friend of mine set up my firewall, and he is out of town for a 
while.  I am attempting to use a program that uses UDP packets on ports 
5198 and 5199.  So my firewall must be configured to allow my machine to 
accept UDP packets on either of those ports, and to send packets out to 
those ports on remote machines.  I have no idea how to accomplish that, 
and would appreciate it if someone can steer me a course toward the 
solution.

Thanks in advance.

Rem