Port forwarding--help

PORT FORWARDING--Please advise



CAN ANYONE TELL ME WHAT ARE THE PORT FORWARDING NUMBERS FOR THIS GAME?

I was recently told by my ISP that possibly the reason i cannot access the game after THE ROLLBACK is because a port
was POSSIBLY closed on my server/router BY THE ROLLBACK process and that i should find out the port forwarding numbers for this
game and then go into my router and open the port that is blocked (IF one is). I don't know anything about port forwarding and my ISP
techies are just throwing this out there as a possibility, something to try. It makes more sense so far than anything else i have heard or tried.

If there is a live body reading this who knows anything about this can you please enlighten me....THANX.