Step by step double Nat Xbox one

[Andysig]

Hi
I have just purchased the above and all was working nicely, now I can not play or even access call of duty modern warfare.
I believe it’s because of this double Nat issue ?
As I’m not very IT at all, can anyone give me a step by step walk through how to get rid of this double Nat issue, I only want a basic wireless or hard connection nothing fancy.
Thanks in advance

[schumaku]

Call your mobile data provider, and request a a public routable IP address assigned to your router. Nothing you can do yon the router...

[plemans]

so what is your full setup? You posted in the nighthawk pro gaming section but then listed the mr1100 in your signature. 

What exactly are you running? 

If you're going MR1000 -----XR***----> xbox, you would indeed be in a double nat. 

If thats the case, either put the mr1000 in passthrough mode or put the XR*** in access point mode.