Xbox 360 can't connect to internet: MTU error

GarethHarper · Jun 3, 2019

What happened: we went on holiday for a week, leaving all gadgets at home unplugged from the mains electricity. When we got back, the Xbox 360 could no longer log on to Xbox Live. All our other gadgets can connect to the internet as normal using a mix
of wired and wireless connections.

The router is a Zyxel VMG1312-B10D.

The Xbox 360 error messages are as follows.

When selecting an account to log on to Xbox Live, the Xbox 360 responds with:

Your console can't connect to Xbox Live.

8015190E

I then tried testing the Xbox live connection using the Xbox 360.

This reports that the Xbox 360 can connect to the home network, but "can't connect to internet".

Suggestion 1 says MTU error and recommends unplugging the router/modem from the power for 5 minutes. Suggestion 2 says MTU error: visit www.xbox.com/mtu-help for more help.

I tried both suggestions. www.xbox.com/mtu-help doesn't exist any more. I found several recommendations on-line that say Xbox Live requires an MTU set between 1364 minimum and 1492 maximum. I checked my router: it had MTU set to 1458.

I looked for help on-line including using the troubleshooting guide here <https://support.xbox.com/en-US/xbox-360/networking/connection-error-solution> and followed recommendations to do these things:

1) Turn on Universal PnP - I had already done this when we got the Xbox 360, and UPnP was still turned on when I checked.

Specifically, the router settings for: UPnP and UPnP NAT-T are both enabled. It says that "UPnP NAT-T only works when NAT is enable" (yes, "enable" not "enabled").

When I look at the UPnP setting on my router, it reports an Xbox at IP address
[mod removed personal information] with a connection: external port and internal port 3074, protocol UDP.

2) Try a wired home network connection: I plugged the Xbox 360 into the home Ethernet and told the Xbox 360 to use it.

3) Reset the Xbox 360 network settings using Network settings: Restore To Factory Defaults.

4) Clear the Xbox 360 cache.

5) Set manual firewall rules to open up the ports listed here:

<https://support.xbox.com/en-US/xbox-360/networking/network-ports-used-xbox-live>

6) Set NAT to do port mapping like this using the appropriate IP address (192.168.1.233 in this case):

: Start : End : Map
Description : Protocol : port : port : port

Xbox 360 TCP 53 53 53
Xbox 360 UDP 53 53 53
Xbox 360 UDP 88 88 88
Xbox 360 TCP 3074 3074 3074
Xbox 360 UDP 3074 3074 3074

7) Put the Xbox 360's IP in the DMZ of my router.

I tried all the above suggestions, and after making the last changes powered off the router/modem and Xbox 360 both. I left the router/modem for the recommended five minutes, then plugged in and powered up the Xbox 360 again. The Xbox 360 still can't
connect to the Internet.

I'd appreciate any suggestions on how to solve this problem.

:)

Ipek07

Well, thanks a lot for the help but I'm not really thinking of updating my xbox before solving the main problem I have, and it's not the MTU error. I can fix the MTU error just by resetting my modem, the real problem is that I can't connect to xbox live
even though I am connected to the internet, thanks anyway :/

Mimori 775

Hello GarethHarper,

Have you tried doing the following:

System settings > storage > hard drive. Press Y and delete the cache.
System settings > storage
Enter the following button sequence: X, LB, RB, X, LB, RB, X
Select the option to roll back all system updates that are installed. The console will restart automatically.
Disconnect your router and turn off your console for 5 minutes.
Once your router is back online, go back to your xbox and complete the update.

GarethHarper

Hello,

Thanks for your suggestion. I followed the procedure to check for corrupt data and I couldn't see any sign of a yellow ! at all.

XBF Brad A

Hi Gareth,

Thanks for coming to the forums with your issue, and posting all that you have done. We recommend first to check for any corrupt data. To do this go to system settings then storage, select your hard drive or memory unit. Go through each category look for
a yellow ! next to anything. The error code you posted states could be a corrupt profile. However, be cautious if you remove any items as you are unable to connect at the moment. If you do remove profile remove profile only if they are corrupt. Once removed
corrupt data then try and connect.

Thanks,

Brad

XBF Chris J

Hey Gareth,

Thanks for letting us know that the issue has been resolved. Be sure to come back if you require any further support, or would like to start a discussion.

Xbox 360 can't connect to internet: MTU error