It has NOTHING to do with forwarding ports. The problem is that they refuse to understand this is not a problem with just ONE game.

I have reports from people playing FFXI, FFXIV, WoW, LoL, BF. It happens on PC and PS3, all those people have in common is UPC, the Thomson router and the new firmware update. Yet UPC refuses to sort it out, since it is not their problem according to the helpdesk.

They were going to call me today since I made a complaint yesterday, but they didn't so far. So I am going to call them tomorrow again to see whats going on.

Did you try the trick with FFXI? It seems to work for me, still have some trouble sometimes, but its better at least.