Many thanks for the pointer. However, I am genuinely clueless on how to implement it with the NAS. I can ssh on no problem, but don’t get how to install it or it’s link to QVPN?
It’s a Q package. So in the GUI of your QNAP go to the app center page. On the top right corner to the left of the settings gear you will see a plus sing in a circle in front of some square looking icon. This will allow you to select the above package were you downloaded it and install it.
Once its installed it you can follow instructions with the ssh to cli for ZeroTier to turn it on and configure it.