Yes, the final setup would be to run Adguard on a docker container and have this container be in a VPN. I’m not sure yet, how I would do that without messing up the other things already running on that VPS. Maybe I will go for Raspberry to run adguard at home.

Edit: I have set the second DNS in Windows to the same IP, so it shouldn’t have a fallback.

thank you, that clears things up a bit. Now it’s to play around with it, until I get it up and running :)

Could you have a look at my answer to the poster above - would multiplexing mean, that I configure my internal IP 0.0.0.0:XXXA for one service and 0.0.0.0:XXXB for another?