Teredo is Unable to Qualify {Solved}

Teredo is Unable to Qualify problem with the Xbox One for Windows 10 lies with Teredo. It is a network adapter protocol that helps facilitate connections such as the ones used in the presence of a NAT configuration. The system may be harmed if this protocol is disabled or hindered either manually or by any software.

The first thing that needs to be checked is whether the Internet connection is working properly. Once this is done and the problem still persists, the user can proceed with the solutions given below.

How to Fix the Teredo is Unable to Qualify error on Xbox one

A message Teredo is unable to qualify will pop up preventing the user from using the Xbox app on the Windows 10 PC. This is one of the big issues that users may face.

Solution 1: Reinstall Teredo

Users have said that in order to fix the Teredo is unable to qualify message, Teredo needs to be reinstalled completely. Therefore it is required to stop Teredo service and remove the Teredo driver. To do this, follow these simple steps:

Step 1: Press Windows Key + X. In the menu select Command Prompt (Admin) or Powershell (Admin).

Step 2: Then run the command:

netsh interface Teredo set state disable

Now remove the driver by following the steps below:

Step 1: In the Win + X menu, choose Device Manager.

Step 2: Then go to View and select Show hidden devices from the menu.

Step 3: After locating Teredo in the Network Adapters section, right-click it and choose Uninstall Device. Repeat the same process for all Teredo devices.

Step 4: From the right-click menu, uninstall anything with Teredo.

Step 5: Restart the PC. Then re-enable Teredo with this line in Command Prompt (Admin): netsh interface Teredo set state type=default

Step 6: Installing the Teredo Tunneling Pseudo-Interface adapter might cause trouble since it reinstalls completely. Make sure NOT to do it.

Solution 2: Check To See If Teredo is Disabled From The Registry

If Teredo is disabled in the registry, the Teredo is unable to qualify error can appear. To modify the registry easily, do the following:

Step 1: After opening Command Prompt, run this line to check iphlpsvc: req query HKLMSystemCurrentControlSetServicesiphlpsvcTeredo

Step 2: If Teredo is disabled, the following line will show up in output: DisabledComponentsREG_DWORD 0x8e

Step 3: Re-enable Teredo via this Command Prompt:

reg add HKLMSystemCurrentControlSetServicesTcpip6Parameters /v DisabledComponents /t REG_DWORD /d 0x0

Check to see if the problem is resolved.

Solution 3: Make Sure If IP Helper is Running

IP Helper service must run in order to use Teredo. A Teredo is unable to qualify error will appear if the service is disabled. Fix this issue by using these simple steps:

Step 1: After pressing Windows Key + R, enter services.msc. Now press Enter or click OK.

Step 2: Locate IP Helper service in the Services window and double-click to open its properties.

Step 3: Now, set Startup type to Automatic and then click the Start button to start the service. Select Apply and then click on OK to save the changes.

The IP Helper Service should completely resolve the problem with Teredo. But according to several users, it will not start due to issues with dependent services. This problem can be solved with the help of the following steps:

Step 1: First open Services Window. Double-click IP Helper to open its properties.

Step 2: In the Properties window that appears, navigate to Dependencies tab. Now have a look at This Service depends on the following system components section. Expand the list and then write down all the services. Mostly the problem is WinHTTP Web Proxy Auto-Discovery Service, so check it first.

Step 3: Make sure these services in the Services window are running otherwise enable them.

Step 4: In the end, try to start IP Helper service again.

If the problem is still not solved, simply restart the PC and check if the issue is fixed.

According to reports, restarting both IP Helper and WinHTTP Web Proxy services and running netsh interface teredo set state type=enterpriseclient command fixed the issue.

Solution 4: Check For An Invalid Value On The Teredo Server Name

Simply checking the server name value might fix the Teredo is unable to qualify error, if it recurs. From Command Prompt, do the following steps:

Step 1: Check for this default correct parameter in Windows 10 with the Command Prompt:

 netsh interface Teredo show state

Step 2: If the parameters are incorrect, use this command line to revert them: netsh interface Teredo set state servername=default

Now check if the problem with Teredo is resolved.

Solution 5: Make Sure The Hosts File Entry isn’t Causing Problems

This problem may arise if the hosts file is changed sometimes. To check the hosts file, do the following:

Step 1: check it with the Command line netsh interface Teredo show state.

Step 2: Use the command line notepad.exe c:WINDOWSsystem32driversetchosts if it displays the message failed to resolve the server name.

Step 3: Search for win10.ipv6microsoft.com by using the Edit/Find function and use the Find Next feature until the subsequent data to find another entry is found.

According to the reports of some users, Access denied messages when editing hosts file pops up but this can also be solved.

Solution 6: Check If Teredo Is Hindered By any Installed VPN Service

When VPN services interfere with Teredo, they create problems for it to function. Disable and remove VPN adapters from the PC to fix the problem. Follow the steps shown below:

Step 1: Under Device Manager navigate to Show Hidden Devices. Then access Network Adapters.

Step 2: Uninstall all adapters with names similar to TAP-Windows Adapter V9. Check if uninstalling has cleared the issues related to Teredo.

Solution 7: Re-Enable IPV6 On All Tunnel Interfaces

The Teredo issue might also occur due to IPv6 which can become disabled on tunnel interfaces at times. This might lead to problems. Therefore fix the issue by downloading a file from Microsoft that will re-enable all IPv6 interfaces. Just follow these easy steps:

Step 1: Navigate to the Microsoft support page.

Step 2: Click on the option Download after locating Re-enable IPv6 on all tunnel interface.

Step 3: Next, run the file and check if the issue is solved.

Solution 8: Create A New User Accounts

Creating a new user account is very simple. Follow these steps:

Step 1: Open the Settings app by pressing Windows Key + I.

Step 2: Navigate to Accounts selection by opening the Settings.

Step 3: Then navigate to Family & other people in the left pane. Click Add someone else on this PC.

Step 4: Select “I don’t have this person’s sign-in information“.

Step 5: Choose “Add a user without a Microsoft account“.

Step 6: Then enter the desired username and click Next.

Step 7: Switch to the new account and check to see if the issue is resolved.

Conclusion

Thus, use one of these solutions to resolve the Teredo related issue and enable a smooth performance of the PC. The above-mentioned steps are pretty easy and simple to use and in all probability, no more problems related to Teredo will pop up.