Wanted to post this here as well for users wanting to see what kind of NAT is being seeing on there xbox 1 consoles:
1. Go into Settings, Network Settings.
2. Click on ‘Test Multiplayer Connection’
3. After the connection runs, and before selecting the button to continue, simultaneously press both bumpers and both triggers on the controller, then release. A more detailed test will then run and the detailed NAT type description will be shown.
NOTE: The XB1 results are not as detailed as the linked NAT test tool. Results for FULL CONE NAT show as CONE NAT, which isn't exact enough to test since there are other forms of CONE NAT.