yes, I agree: it's very easy to do. Alas, it was definitely plugged into a LAN port. For reference, I'm using a TP-Link VR900.
To make things more interesting a dug out a (very) old router and factory reset it and tried that, which worked perfectly....
Could something be blocking the UDP broadcast? Presonus mention a list of bad routers with not too much reason about why they're bad.
I'm going to try a direct Ethernet connection tonight.