Server Connectivity Blocked/Teredo unable to ...

Hey,

(before everything, I'm gonna apologize for any mistakes or misunderstandings occuring due to my english, giving my best but still not perfect )

I've only recently bought myself Forza Horizon 3, mainly to play it with friends.

As I first played the game I had zero problems joining online sessions, only as my friend finished his download my online sessions started to bug out. (I know that his finished download should not have any affect on)

So, I've searched through a couple of forums and blogs that were trying to solve this problem/these problems.

All of these solutions didn't seem to work at all. whenever I try to check my network on the Xbox App it tells me that either Nat-Type has a strict connection, or that teredo is not able to connect, or another error, the server connectivity is completely
blocked.

What is concerning me now, is that the problem came up over night without me changing anything about any settings and I cannot seem to fix it with any of the given solutions.

:)

 

Teredo unable to qualify

Try this troubleshoot, I know the link says "party chat" but is a teredo unable to qualify error.

Xbox App NAT Type Displays Teredo Is Unable to Qualify | Xbox App on Windows 10

For the server blocked, you can this solution: Xbox App Server Connectivity on Windows 10 Is Blocked

 

Teredo is unable to qualify

I keep getting an issue on the xbox app on windows 10 PC, it says NAT type: Teredo is unable to qualify and my server connectivity is blocked and i have looked at all forums on the microsoft website and nothing seems to fix my issue

 

I'm having the same problem.

I've been trying most of the things that have been posted about the teredo tunneling adaptor, firewall settings, etc etc etc...

Nothing works.

Anyone know the fix for this?

 

I'm actually having this problem as well. I'm not getting the Teredo message at all but when I run the network test it's coming up as strict when everything else is reading as connected. I've called Comcast and they tried reserved ip, port forwarding, DMZ,
& zero config all to which none worked and they told me it had to be a problem on Microsoft's end. My Xbox One console is open and everything else on my network works great. The only thing I can think of is it being part of the new Windows Insider build that
is the creator's update. I really would like some info on this if Microsoft could look into it and address the situation please. Thanks!