Okay so few things about this you need to know how to access your modem / router because we are going to mess about in there. Some of you did this for MW2 / AOE3 or whatever.

If you visit http://www.infinityward.com/nat.php which is where the game sends you, it will tell you to set UPnP to on or yes. Which is helpful and will also tell you to allow anonymous NAT redirection, however most routers won't have this option or you just plain cannot find it.

So we visit the geniuses at:
www.portforward.com
Not only will they show you how to login to your router if you haven't the slightest idea, but actually tell you which ports need forwarding (unlike infinity ward which tells us to visit our router manufacturer and pester them). For those who know how to port forward already we are forwarding:

3074 - 3074 TCP/UDP
27000 - 27050 TCP/UDP

You should also note that some modems and routers simply don't forward ports unless you enter the commands in the command line, and others just don't do it at all.

Good luck

^^ works for pc mw3 if your on bigpond and youve portforwarded the ports and still doesnt work

for xbox with those port forwarding things. the ip address it asks for is it the internal IP that is listed on that site or do you put in your own ip?

I need it on OPEN for pc mw3.... and upnp is on and the port forward site just gives u some crappy download program that costs so any idea

For ppl who running Win7 u will need to turn on telnet.

To do this go to start > control panel > programs > turn Windows features on or off

Chech telnet client and click ok. then u can use telnet.

yeah my pc mw3 is now now open

Ahhhh you need your internal ip address. To find it go to start > run type cmd.exe and then type "ipconfig /all". The address your looking for is 192.168.1.* (*is a number between 2 and 254).


Lol thats an ad, skip it on the top right hand corner...

Thank bro.

hey i have this same problem but because i dont use a router i use a switch so it isnt on the list i got a NETGEAR 5 port FS605 i have googled the shit out of different sentences because im just that ******ed i wouldnt know where to start looking hahaha what do i do?

hope this is clear enough what dpo i add where then what do i do

Edited once, 16/12/11 - 9:45am.

Grammar is important! Its the difference between helping your Uncle Jack off a horse and helping your Uncle jack off a horse.