I just shipped a 9.25” Edge scope setup with ASIAIR to StarFront Observatories in nowhere Texas, Bortle 1 skies. They now have 600+ telescopes installed there for remote operation. Of the 600+ scopes, the y said over 100 are using ASIAIR! Impressive!
Starfront provides all the credentials to use OpenVPN to access your scope (whether using NINA or ASIAIR or whatever,
I have been using TailScale which is a very easy to use VPN setup and free for small scale geeks like we astronomers.
Tailscale has a free client app to install on your smartphone, tablet, Mac or Windows machine. You setup a TailScale account, then add your devices. You need to then have a TailScale running on the remote network… a Mac, Windows, or even an AppleTV. Then you can access any device on the remote network where you have one of those “subnet servers”. For example, I have TailScale installed on my AppleTV at home. So if I’m traveling, I can access all devices on my home network (telescope, printers, etc) from my iPhone, iPad, or Mac…. Thru the AppleTV at home.
For zstarfront, I shipped a travel router GL-MT3000 with my scope. The GL-MT3000 has TailScale already installed, you just sign-in to the admin portal, enable TailScale, and bind it to your TAILscale account by your email address. Easy-Peazy.
That being said, ZWO could supply a TailScale client pre-installed on ASIAIR which would allow you to bind it to your account and directly access it from anywhere in the world, without the need for a separate subnet server.
It works flawlessly for me without a lot of geeky configuration scripts etc.
Jim in Boulder