Windows 10: Teredo unable to qualify although I tried everything I could find online

Problem occured more than a month ago where I couldn't connect to any Xbox Live service, including Forza Horizon 4 online session. I tried some fixes and they worked, at least for a short while. 10 days ago, same problem occured again and since then, no such solution could fix my problem. Here is the exact issue and the methods I tried

• 
  NAT Type: Teredo is unable to qualify.
  
  
• 
  Server Connectivity: Blocked
  

Type : enterpriseclient

Server Name : win1901.ipv6.microsoft.com.

Client Refresh Interval : 20 seconds

Client Port : unspecified

State : offline

Error : primary teredo server unreachable over UDP

Servername is obtained automatically by using "netsh int teredo set state servername=default" command

A quick note: I started to get the "primary teredo server unreachable over UDP" after some point. Once I started to get this error code, I tried port forwarding etc. Here are solutions I tried (not in the exact same order but I tried ones on official Microsoft pages first):

• "Fix it" button under Settings>Gaming>Xbox Network

Everything on the following official Microsoft pages:

• https://beta.support.xbox.com/help/...server-connectivity-xbox-app-displays-blocked
• https://beta.support.xbox.com/help/Hardware-Network/connect-network/troubleshoot-party-chat

and followings from different pages

• Used gpedit (group policy editor) to force teredo to exist and have default servername (this one fixed my problem when it first occured but not this time, more info: https://www.reddit.com/r/Windows10/...missing_in/?utm_source=share&utm_medium=web2x)
• Tried with different server names
• Did port forwarding in router interface
• Added new rule for port forwarding in the Windows Defender Firewall settings
• Tried each and every security option (enabling and disabling) in router settings
• Tried with a different internet and router
• Tried to connect using a different account on the same computer
• Tried to locate Teredo network adapter in device manager (it wasn't there and it never showed up under Microsoft brand when I tried to add it using Add Hardware Wizard)
• Troubleshooting in the settings
• Deleting and reinstalling all Xbox apps

Also, all drivers and Windows are up-to-date. I tried them individually, not in a row, and I paid attention to restart my computer after each solution. I also reset my router at some point but that did nothing as well. All of the settings under Windows Security page is enabled and there seem to be no problem.

Today, like 2 hours ago, I did a clean Windows setup, formatted all disks, I updated all my drivers as well as Windows and guess what, Teredo still DOES NOT work. I tried the solutions on official Microsoft pages over again after clean start as well as the reddit post I included above. I legitimately tried everything I could think of and found so far. At this point, I don't even know what to do. I thought about calling my ISP and shouting to their face but I don't think it is because of my ISP, if it was then why teredo weren't working when I tried it on whole another internet and router? Please help me to get rid of this frustrating situation, I just want to play FH4 -it is the only game I can't play online, and it is Microsoft's. How ironic.

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Teredo unable to qualify

Hi JayKay,

Thank you for writing to Microsoft Community Forums.

Failure to obtain a Teredo IP address can occur when there’s an issue with your Teredo adapter, when a device on your network is blocking the Teredo protocol, or if there’s software installed on your PC that’s disabling
Teredo functionality. If you haven’t tried the methods listed in the following articles yet, I would suggest you to try them first and see if it works:

• Teredo is unable to qualify
  
• Xbox app server connectivity on Windows 10 is blocked
  
  

Note:

Serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry
if a problem occurs. To backup and restore registry key, refer to this
link.

If the issue persists, I would suggest you to
uninstall and re-install the Xbox app to see if you can get it to work.

• Right click the Windows icon on the taskbar and choose Windows PowerShell (Admin).
• Copy and paste the following command and hit Enter:
  
  Get-AppxPackage Microsoft.XboxApp | Remove-AppxPackage
• Reboot the computer once the command is executed.
• Once the machine restarts, launch Microsoft Store and reinstall the Xbox app.

After reinstalling the Xbox app, open Windows PowerShell (Admin)
again and copy paste the following command to enable Teredo.

netsh interface Teredo set state type=default

Let us know how it goes.

Regards,

 

Teredo is unable to qualify

Hi,



Thank you for writing to Microsoft Community Forums.



I understand that you are facing issues while playing games as Teredo is unable to qualify. For further clarity on the issue, please respond to the questions below.

1. Are you aware of any changes made to the PC prior to which you weren’t facing this issue?
   
2. Which build version of Windows 10 are you using currently?
   

Refer the article
Which version of Windows operating system am I running?



Meanwhile, I would suggest you to refer the article
Teredo is unable to qualify and see if that helps.



Note: Serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can
restore the registry if a problem occurs. To backup and restore registry key, refer to

this link.



In addition, as you have mentioned that Norton is blocking a port which is being used by Teredo adapter, I would suggest you to try disabling the antivirus and check if the status changes.



Note: If you disable the security software or firewall, the system might be temporarily exposed to security threats and risks. Please make sure to turn it on after performing the steps.



You can also create an exception in Norton for the ports, refer the article

Use the Add Rule wizard



Regards,

Prakhar Khare

Microsoft Community – Moderator

 

Teredo is unable to qualify.

The issue I'm having is my xbox app says teredo is unable to qualify and none of the steps in this link worked. Xbox Support

Besides that I am not sure where this problem could be coming from.