I am getting very frustrated as it seems I am unable to get a proper connection for my Series X using the Now TV Hub Two. I do have a connection, but it is a 'strict NAT type' and the console 'cannot get a Teredo IP address'.
I have checked the settings and everything is turned on, including the UPnP and the IvP6 service that specifically says it helps connections to services like Xbox One! And yet, I am still getting this issue!? I can't possibly be the only one, yet I see no one else discuss this teredo problem.
I attempted port forwarding, specifically the console asks to make sure UDP 3544 isn't blocked, so I included that in my set up, and yet it is still not being recognised by the console.
No harm in trying switching off Broadband Buddy, but it didn't work for this person on this linked thread below on the Sky equivalent Sky Shield.
I don't know if Xbox can work on IPV4 only without IPV6, but I found IPV6 on some of my internet devices caused connection issues and drop outs and since I disabled IPV6 on the NOW Router I haven't encountered no discconections or dropouts on any of my playback devices (everything has been running fine for 3 years plus on NOW since the changes was made).
its not the dreaded roadband buddy setting is it?
I don't own an Xbox, but see if anything in this Sky thread linked below gives you any pin pointers.