well as far as I know from looking at the EQ CS database that it is a random port as far as the client is conserned. thats why the tell you to open all ports between 1023 to 65335 or some thing like that
here is a few links on that info
http://help.station.sony.com/esuppor...nnext&number=6
http://help.station.sony.com/esuppor...lecttype=match
hope this helps