Ok, my NAT is Strict and it won't open. I have tried port forwarding and none of it works. I went to the website listed on MW3 (www.infinityward.com/nat) and it won't load. What do I do to get my NAT open???
You may want to make sure the required ports for this game are opened properly. Below you'll find a step-by-step on how to get these open:
1. http://portforward.com/networking/staticip-ps3-playstation-3.htm This guide will show you how to set a static IP address for your Playstation 3.
2. http://www.portforward.com On this webpage click on Router List > Select your router > Select your game (PS3 Call of Duty: Modern Warfare 3) > Follow the steps in the provided guide.
3. Disable any firewall or security features within your router.
4. Set port forwarding on your router to the IP address of your Playstation 3. This game uses ports 81, 3074, 3075, 3478, 3479 (UDP) and ports 80, 443, 3074, 5223 (TCP).
For voice / video chat and online game play, direct communication with other PS3 systems is used for data transmission during voice / video chat and online gaming. The port number used for this is UDP: 3658
Once you have done that, go ahead and restart your console, modem, and router. Try to connect to MW3 once everything has been restarted.
I just got out of a game and my NAT type changed to strict. I am so lost on this site as well. Any help? PSN network name is S-Wierzbicki. Please help.
if using dsl make sure modem is in bridged mode so there are no fire walls or ports closed in modem.