I have it semi working.
Setup a wireguard VPN on a raspberry pi. On home network.
Wireguard has clients for both windows and android.
When I activate the VPN tunnel from my office or the mobile I have full access to Roon and it’s functions, the only thing missing now is roon core does not recognize anything remote as a playback device. Just the devices on the local network. I can search and play stuff on my home Denon though driving in the car.
So I’m close just need to figure out the final piece. As a BTW, when I activate the VPN and I’m on the laptop in my office I can attach to the Intel NUC that I use as the Roon core via remote desktop . So I can remote desktop in open roon play a song and it plays out of the remote laptop. Sounded pretty good too. So for less then 100 dollars us for the pi VPN server. It’s a not very elegant way of making this work but it sounds like some of you have this actually figured out.
I do have a Synology NAS 920+ that all my media lives on but I don’t use that for the Roon core or the VPN . Maybe that’s the route?
And then the heavens opened up and you could hear the voices of angles!!
Dude, thank you!
Up and running, no extra gear. The zeroTier was aces!
Had to change course but hey gotta be flexible. Changed out the NUC with an old Lenovo Thinkcenter mini that’s about same size as NUC. And it’s still an i7 windows box. So now, remote laptop can connect to Roon server at home and also works on Google pixel 2XL android mobile.
Next step take pi that I was using for VPN put ZeroTier on that ,add a dac board and see how well that works as remote endpoint this way I don’t tie up laptop.
Thx again to all who recommended the zeroTier route. Really simple , easy and no extra cost.