help please, error port p2p


Hello! it is impossible to play age of empires online, I have 600 ms and my friends too, before playing I always get an error:

NAT could solve the error, notice of performance: the traffic between your machine and that of … is being sent through a retransmission network. this prevents receiving traffic from the p2p port of steam.

What could I do? I already talk to my internet company and they tell me that everything is fine, I just want to pl y :confused: