Impossible d'activer Teredo [Translation - Unable to activate Teredo]

Hi Mathias67,

Thanks for reaching out to us in the forums for this issue concerning Teredo. 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). Without a Teredo IP address, you’ll be unable to use party chat or do multiplayer gaming on Xbox Live. Generally, this is a setting in your router or PC that can be toggled on/off.

To get your Teredo to qualify, I would recommend the troubleshooting solutions available from the following support articles to get yourself back on the track:

NAT type on Windows 10 displays "Teredo is unable to qualify"

Xbox Live server connectivity on Windows 10 is blocked

Give the solutions and troubleshooting a try and let us know the results.

I hope that this helps out!

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).
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. Without a Teredo IP address, you’ll be unable to use party chat or do multiplayer gaming on Xbox Live

If you can’t hear your friends online, or you can’t join or host an Xbox Live multiplayer game, go to
Network > Settings in the Xbox app and check
NAT type.

If it says Teredo is unable to qualify, 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).

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. Without a Teredo IP address, you’ll be unable to use party chat or do multiplayer gaming on Xbox Live.

For a possible solution: https://support.xbox.com/en-US/xbox-on-windows/social/troubleshoot-party-chat

If you can’t join or host an Xbox Live multiplayer game, or you can’t connect to a party chat session, press the
Start button, select Settings > Gaming >
Xbox Networking and check NAT type.

If it says Teredo is unable to qualify, 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).

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. Without a Teredo IP address, you’ll be unable to use party chat or do multiplayer gaming on Xbox Live.

For more info: https://support.xbox.com/en-US/xbox-on-windows/social/troubleshoot-party-chat

Hello EPICONLP,

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).

Sometimes, you just need to go into your router to activate teredo, or "Teredo tunneling". If it is already activated, turning that setting off and then back on can help.

Don't forget to try the troubleshooting in that support article given to you by Amber above. Click on that link, and select the teredo error to begin troubleshooting.

Hope this helps!