Going back to basics, I've built the TNet 3 example in a clean project. I ran it on an Android device (Nexus 7) and in Unity editor. When creating a server on Android, Windows can join. When I create the server in Unity, Android fails to connect,"Connected: False Unable to Connect (Player id #1)."
Doing the same with TNet 2, it works both ways.
I've just tried on my Surface Pro 4 and the example works. So it's an issue with my development PC and TNet 3. How do I go about resolving that? I disabled security (Kaspersky) as the obvious potential culprit but that didn't resolve anything.
edit: The SP4 can't connect to the desktop either.