Xbox App on Windows 10 - Server Blocked - Teredo Filter

Moritz Becker · Mar 25, 2019

Hello Guys a friend of me and I want to play Forza Horizon 4 online. But the server-connection in the XBOX-App is blocked. We've already seen some tutorials and we both have a FritzBox router. One solution is deactivating the teredo filter in the fritz.box
webinterface. Butttttt that's very dangerous because the protocol is old and not secure.

Is there any other possibility to use the xbox application without deactivating it?

Thank you and have a nice day

:)

XBF George L

Hello!

Thanks for reaching out to us here on the forums with this situation. I understand you're having Teredo and/or Blocked server problems on your Xbox App from a Windows 10 PC. I recommend you take a look at these helpful support articles and give the steps
within a try.

Xbox app server connectivity on Windows 10 is blocked

Xbox app NAT type on Windows 10 displays “Teredo is unable to qualify”

XBF Ezra G

Hi Mortiz,

Thanks for your response. If your router is blocking Teredo tunneling, you may want to check with your router's manufacturer for steps to enable Teredo tunneling, port forwarding the port number 3544, and ensuring your router's firmware is up to date.

Please let us know how this goes.

Moritz Becker

I've already tried these "solutions" but nothing worked for me. The problem is that my router blocks the teredo connections.

XBF Amber M

Hi Moritz,

Thanks for the reply. When it comes to the FRITZ!Box, you would need to enable that Teredo tunneling on it in order for a network security, especially on an IPv6 connection. For Teredo to function normally, the router needs to be configured to enable
Teredo connectivity. The Teredo IP address is only necessary for Xbox Live party chat and multiplayer features, which means that if you're wishing to play Forza Horizon 4 online in a multiplayer setting and connect with your friends via party chat, it
is necessary. Solution 6 from second link provided by XBF George is the

If you do not feel comfortable changing the settings yourself, then you may need to reach out to your ISP to see what may be done on their end to safely effect that change to enable the Teredo. You can also check our Xbox Forums specifically
for individuals using FRITZ!Box by
clicking here.

FRITZ!Box Service would also be a good place to seek some advice as well.

I hope that this info helps a bit more!

XBF Amber M

Hi Ray,

Thanks for reaching out to us in the forums for this issue. Sorry to hear that your access to Xbox live is not being allowed due to Teredo tunneling being blocked. Since you appear to be using a PC, you may wish to try the troubleshooting available in the
following support articles:

Xbox app NAT type on Windows 10 displays “Teredo is unable to qualify”

Xbox app server connectivity on Windows 10 is blocked

Give them a try and please let us know the results!

I hope that this helps out!

Xbox App on Windows 10 - Server Blocked - Teredo Filter