You should post this on an xbox support forum. You might get better help there since this is an xbox connection issue, nothing to do with minecraft. There are probably already some solutions there and maybe even people with the same router. Glad you got it working though.
I thought Id write a message about the connection problems we where having since we got the xbox one and minecraft.
I went through a lot of post on the internet and it seems a lot of people have problems because of the NAT being
STRICT, MODERATE, OPEN . I tried so many things like port forwarding, resetting router, it was endless. I could not
get my NAT to open on my Rogers Cable Hiltron Modem/Router. I tried one last thing which was to assign the
xbox IP that it showed in the XBOX ONE Network Settings and set this in the DHCP as an assigned IP (192.168.0.15) that is
what I keep my xbox on, a static IP I set up on the router, then I put the XBOX ONE IP (192.168.0.15) in the DMZ . I went
back up stairs and the xbox said NAT OPEN ! , then we tried a test run with the sons friend, and bam, working, tried later
in the day again, bam, working, so I am writing this to say I got the NAT OPEN by putting the xbox one in the DMZ with
an assigned IP, that way the xbox is always on the same IP, and always that IP is in the DMZ. So far so good, I will
write back if this has 100% solved the problem, but the laughter in the bedroom all day was great ! with the xbox and minecraft
working together and getting the children hooked up without the conenction not being able to work.
You should post this on an xbox support forum. You might get better help there since this is an xbox connection issue, nothing to do with minecraft. There are probably already some solutions there and maybe even people with the same router. Glad you got it working though.