So what do I suggest? Well obviously properly configuring your network and forwarding the ports. Again, a properly configured network connection, with properly forwarded ports is safer, and more reliable. This is fine for an Xbox360 or PS3, but I wouldn't do it with a PC. As such, anything in the DMZ is effectively NOT protected by the router in any way.

Other sites suggest adding your PC to the DMZ.

But if you want to listen to the people who thought it'd be a good idea to remove dedicated servers and mods go to If you configure your network properly, forward ports properly etc, you'll have a safer more reliable connection. In fact I'd go as far as saying 'Fuck that.' UPnP is a known vulnerability. Now infinity ward recommend that you enable UPnP on your router. The two most commonly recommended fixes (including the one from infinity ward themselves) are complete bull in my opinion. I'm going to add my own 2 cents, as I have some major disagreements with most of what's being said. Various posts I've read on the web have recommended all sorts of things. I've noticed a few people are having problems with 'Strict NAT' and having trouble playing online.

Mw2 open nat windows 10