Mission Planner on laptop - X-Plane on desktop, can't connect in SITL

I have tried connecting UDP adding the IP address of the computer running X-Plane but I just can’t get it to connect. What obvious thing have I missed?

The laptop is running Ubuntu

I should add, still connects all fine locally on

That was quick, solved! I should have selected TCP and the X-Plane computers IP.

In the words of Homer - Doh

But wait there’s more. That only worked until I started flying!

So in summary, I think it connected once and I have no idea how, but I might just be making that up.

I made this longish video for my friend showing all of the setting I fiddled with getting sitl working with x-plane 10 and windows. Not sure if it will help you. But here it is https://www.youtube.com/watch?v=wTGz0uMBtZw