call of duty: modern warfare 2

Ok I have the original copy of COD6 and i play multiplayer, however, I am using a router and my NAT is strict. I need to know how to open it so that I will be less restricted.
I have already tried to enable UPNP(inifinityward’s instuctions) but to no avail.
pls help. Thx in advance
Answer #1
You have to change your router setup for your NAT type to change, what router do you have?
Answer #2
D-link DI-624+