How to fix Call of Duty: Modern Warfare 2 connection issues like error HUENEME - CONCORD

HUENEME is the ENEMY.

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This weekend I settled down for some games of Call of Duty: Modern Warfare 2, only to be slapped with an ominous connection error.

“HUENEME - CONCORD” is an error designator Activision support can use to help you diagnose connection issues, but the game’s support team is absolutely swamped with requests right now as the Call of Duty: MW2 launch gets underway. So, what can you do in the interim?

After wrestling with my router and connection settings for an hour, I seem to have solved the issue, at least for me. Here’s what I did, and here’s what you can do to help alleviate connection problems withCall of Duty: Modern Warfare 2on Xbox, Windows PC, or PlayStation.

1. Hard reset your console

1. Hard reset your console

The first option is the most obvious, but perhaps the least intrusive. A hard reset can help your console flush any problematic network settings that might be causing hiccups, allowing it to get a fresh connection from your router with new settings.

2. Enable UPnP and disable Teredo Filtering on your router

2. Enable UPnP and disable Teredo Filtering on your router

Xbox Live and Activision’s services use Teredo and UPnP (Universal Plug n' Play) to configure your devices for multiplayer games. Some routers (like mine) have Teredo filtering on by default, which blocks Teredo services from functioning. Other routers have UPnP turned off by default, too.

Configuring these settings should help your router to set up the correct ports automatically, but it doesn’t always work. Still, it’s worth trying before moving to the next step.

3. Set up a static IP and port forwarding

Potentially the more complicated method, this is all about opening ports used by services on Call of Duty and Xbox Live for multiplayer. Some routers have aggressive security measures that block certain ports to prevent attacks. It’s unlikely that you’d find your network compromised by opening these ports, but here’s how to go about it.

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Call of Duty (and Xbox in general) needs the following ports to be open to function correctly on Xbox:TCP ports: 53, 80, 307.UDP ports: 53, 88, 500, 3074, 3544, 4500.These are the ports Call of Duty needs to be open for functionality on PC:

TCP ports: 3074, 27015-27030, 27036-27037.UDP ports: 3074, 4380, 27000-27036.

The methodology for forwarding and opening up those ports will vary wildly by the device. On some routers, you’ll need to assign open ports per device, on others, you’ll need to do it globally.

You can find guides for your specific router model at thisPortForward.com website, but here are some generalized steps.

Troubleshooting

There are a few troubleshooting steps you can take to figure out exactly what might be going on, before attempting to send a ticket over toActivision support.

Jez Corden is the Executive Editor at Windows Central, focusing primarily on all things Xbox and gaming. Jez is known for breaking exclusive news and analysis as relates to the Microsoft ecosystem while being powered by tea. Follow onTwitter (X)andThreads, and listen to hisXB2 Podcast, all about, you guessed it, Xbox!