You can buy the Tailscale/Mullvad plugin, I think that’s the only way to make the two work together “seamlessly”. I didn’t want to pay for that, so I put a reverse proxy and tailscale on another VM and pointed the reverse proxy to the services I want to access remotely with tailscale.

I use mullvad via Tailscale. It’s a little different as you don’t actually ever have anything to do with mullvad, you pay Tailscale for the service ($5) and then you are able to use mullvad vpn exit nodes. It took me a little while to figure out cause I kept looking at their mullvad website and thinking how on earth do I make them work together

Well, it’s easy to set up and consisyently passes Mullvad’s leak test. The again, yesterday Google(*) insisted in believing I was in Iran (not the selected exit node)…

Guess I’ve, involuntarily, been drafted to the Iranian cyber command.

(*) I was fidgeting around with running Chrome through a KASM server.

i think you need to look into routing. Specifically, split tunneling.

https://tailscale.com/learn/what-is-split-tunneling-secure-critical-data-vpn

https://protonvpn.com/support/protonvpn-split-tunneling

https://mullvad.net/en/help/split-tunneling-with-the-mullvad-app

I have a nextcloud server. I’m using tailscale to connect to it remotely.