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How To Fix The Hueneme Concord Error In Modern Warfare 2

The servers for "Call of Duty" games have not had the easiest go of things — despite "Modern Warfare 2" and "Warzone 2.0" being the franchise's highest-profile releases, both titles have been plagued with technical issues ranging from overpowered bugs to errors that prevented players from being able to log on entirely. There's a long list of "dev errors" that pop up across the series — with some requiring incredibly involved troubleshooting steps to fix — alongside invisibility glitches that had players fuming, as well as the standard connectivity errors.


There are even some errors with puzzling names, like the Puget Atlus error that usually amounts to server-side connection issues — another is the Hueneme Concord error, which apparently is an issue across both "Modern Warfare 2" and "Warzone 2.0." This error pops up straight from the main menu, locking players out of fiddling with any in-game configurations to try and fix it. For better or for worse, the only solutions involve dealing with your hardware and internet connection outside of the game itself.

Here are all the known methods of resolving the Hueneme Concord error in "Modern Warfare 2" (that may or may not help with its appearance in "Warzone 2.0").

Troubleshooting your internet connection

It seems that Hueneme Concord is a server connection error, though no one is really sure when, how, or why it occurs. A possible quick fix might be to reset your router with proper power-cycling timing — i.e., turning it off, waiting at least 30 seconds, then turning it back on — as well as checking for any updates on any of the software involved in launching the title: your console system, your PC system, Steam, and of course, the game itself.  If you want to go the extra mile, checking your firewall exceptions probably won't hurt, either.


Another proven possible fix has been to clear out your temporary network connection files. Console players can follow the same cache-clearing methods as described in the later sections of SVG's fix for Dev Error 6039 (without going as far as reinstalling the game, as that doesn't seem to apply to the Hueneme Concord error). For PC players, it's as simple as opening up the command prompt — which can be found by searching in the Windows bar and should be right-clicked and "Run as Administrator" — and inputting a few commands:

  • ipconfig /flushdns
  • ipconfig /registerdns
  • ipconfig /release
  • ipconfig /renew
  • netsh winsock reset

After that, reset your PC, and see if the error persists. Once again, giving your router a good power-cycling restart at the same time won't hurt, either.

You might have to do some advanced troubleshooting with your router

Unfortunately, if the above doesn't work, there's a high chance there's some sort of incompatibility between the game servers and your network connection. An easy way to test is to simply connect your console or router to another network to see if the error pops up again. If you have a cellular data plan, try setting up a quick mobile hotspot through your phone and connecting there. If the game lets you pass the main menu without error, it means your wifi network is the issue and you'll need to either use a VPN or set up some port forwarding. 


Unfortunately, both options have their downsides — while using a VPN is easy and simple, getting a VPN connection of high enough quality that you can feasibly play fast-paced multiplayer games without unplayable latency can cost you a pretty penny, especially if you're not interested in the usually discounted long-term subscription packages. 

On the other hand, forwarding your ports is entirely free. However, it comes with the downside that the process varies by router brand and model, and can be somewhat difficult to follow for those who aren't familiar with what DNS ports do or even are. Still, if you don't already have a VPN subscription or aren't in a position to buy either the marked-up short-term packages or the discounted multi-year plans, learning how to configure your ports is your only option.


There are a few ports confirmed to help bypass the Hueneme Concord Error

Thankfully, you don't really have to understand the ins and outs of how a router works to set up port forwarding — for the most part, anyway. Since the process varies slightly by router, you may find yourself needing help from your internet service provider's support line or a more tech-oriented friend or family member. 


The basics of it involve logging into your router via typing in your router's IP address into your browser's address bar without any extensions like "https://." You can find your IP address either written somewhere on your router itself, or through the information in your network settings. On the admin page, you should be able to find the Port Forwarding options. You'll want to edit the TCP or UDC settings to patch the port numbers that work with "Modern Warfare 2" and "Warzone 2.0" (both of which, fortunately, use the same ports): 

  • Steam
    • TCP: 3074, 27015, 27036
    • UDP: 3074, 27015, 27031-27036
  • PC
    • TCP: 3074, 4000, 6112-6119, 20500, 20510, 27014-27050, 28960
    • UDP: 3074, 3478, 4379-4380, 6112-6119, 20500, 20510, 27000-27031, 27036, 28960
  • PlayStation
    • TCP: 3478-3480
    • UDP: 3074, 3478-3479
  • Xbox
    • TCP: 3074
    • UDP: 88, 500, 3074, 3544, 4500

As you can see, 3074 seems to be the magic number that shows up across all platforms with the exception of TCP ports on PlayStations. If you can, forwarding your UDP port to 3074 should help you bypass the Hueneme Concord error for all devices connected to your network.