Windows 10: "Teredo is unable to qualify"

Discus and support "Teredo is unable to qualify" in Windows 10 Network and Sharing to solve the problem; Encountered this when trying to play Astroneer with my friends today. The important things to note: 1. The Teredo Adapter is not listed as a... Discussion in 'Windows 10 Network and Sharing' started by DanielSkeete, Jun 25, 2019.

  1. "Teredo is unable to qualify"


    Encountered this when trying to play Astroneer with my friends today.


    The important things to note:

    1. The Teredo Adapter is not listed as a network adapter even when I have "show hidden devices" selected.
    2. I have attempted to install the adapter via "add legacy hardware" only to find that the adapter isn't even listed as an option, when it should be.

    I used to be able to play Sea of Thieves on this PC, earlier this year, so at the very least at some point the adapter was working on this pc, and now it's not. I have followed just about ever guide and run every command prompt listed to no avail. My last option is to do a full reinstall of Windows and hope that solves it.

    Any suggestions as to what I could do before doing that?

    :)
     
    DanielSkeete, Jun 25, 2019
    #1
  2. Junaid_A Win User

    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:


    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,
     
    Junaid_A, Jun 25, 2019
    #2
  3. Invisibleman145, Jun 25, 2019
    #3
  4. "Teredo is unable to qualify"

    My NAT type says "Teredo is unable to qualify"

    Hi Kole,

    You may receive the error message Teredo is unable to qualify
    if your PC is unable to obtain a Teredo IP address. Teredo is a networking protocol that’s used to establish secure communications between clients and servers and to facilitate connectivity between devices behind routers that use network
    address translation (NAT). To resolve your concern, we suggest that you follow the steps provided on this

    link
    .

    If you have already done those steps as you mentioned in your description, you may proceed to open the network ports and setting a static Teredo port by following the steps on this

    link
    .

    Keep us updated with the results after performing the suggested solutions above.
     
    Loraine Mon, Jun 25, 2019
    #4
Thema:

"Teredo is unable to qualify"

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