Optus mini wifi/xbox 360?

i am not familar with that but if you have a router this is what i did i went and port forwarding in your router settings you have to do it for indavidual games like i did it for cod black opps and halo reach you just have to find the right port numbers that should fix it say that. but i have a 15meg connection and it said nat type is moderate it doesnt really affect anything after i port forward it dident say it anymore.