blog howto

Call of Duty Modern Warfare 3 port forwarding (NAT type Open)

If UPNP or DMZ is not an option for you (or you want more security), you can manually forward some ports to get NAT Type OPEN for Call of Duty Modern Warfare 3.
28960 is the port that COD has always used, but you need some steam ports too. The screenshot below might have some ports that are only needed for outgoing connections but documentation is really hard to find about these ports. It works for me with these ports.
COD MW3 port forwarding
To sum up the ports: 28960 (TCP+UDP), 1500 (TCP), 3005 (UDP), 3101 (UDP), 2700-2704 (UDP), 2715-2717 (UDP), 3074 (UDP). You have to forward these ports in your router/modem to your PC. I suggest you read documentation or search the Internet on how to forward ports for your router/model type.

Remember that if you have Windows firewall of another software firewall on your PC enabled you need to add an exception for all these ports in the firewall.

7 replies on “Call of Duty Modern Warfare 3 port forwarding (NAT type Open)”

I have exactly these ports forwarded and have since NAT type Open (was Strict before).

Make sure your windows firewall is disabled as well for testing purposes. If that changes things than you can add rules in the windows firewall for the ports above.

I have the windows firewall just disabled as I trust my home network and NAT blocks any access to the PC from the Internet except for the ports you forward. But never do a full DMZ to a windows PC!

You can play without port forwarding. Wireless or wired does not make a difference.

You need the port forwarding to host games and lobby’s. If you don'(t understand what port forwarding is, this article is not suited for you.

Erm for someone who types like they think they know what there talking about, you dont know much Stan. A wired connection is type 1, and wireless is type 2, ie an ethernet is optimum for the default routers gateway to determine the respective ports for its relating games, you’ll find most gamers use a hardline than a wireless set up, partially due to connectivity and ping issues.

Port forwarding has to do with NAT (Network Address Translation) and TCP ports, this is a high layer of the OSI or the TCP/IP network model and has nothing to do with the media beneath it like ethernet cable or wireless. I suggest you read up before trying to teach me something.

And of course I prefer playing with a wired connection for low latency, although on a strong link and decent equipment it shouldn’t matter that much.

ethernet is optimum for the default routers gateway to determine the respective ports for its relating games

The sentence above does not make any sence at all.

TCP/IP vs OSI and in between the real world protocols.
Network Address Translation (NAT) is necessary because people use private IP ranges (example 192.168.x.y) at home that are not routable on the internet. A consumer router uses NAT to make multiple devices have internet connectivity. NAT replaces the source (your computer) address of outgoing IP packets with the IP address assigned by your ISP to your router.

TCP ports are channels (simplified view) used by programs to communicate with each other without interfering with other programs. Because NAT changes the source address of outgoing packets, the destination only knows your ISP IP address and thus the packets arrive on your router, not on your PC. Port forwarding solves this by forwarding traffic on certain ports (certain channels) always to a specific computer. So the packets arrive and communication in both directions works.

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.