First of all, I would like to point out that is not exactly the first time that I setup a vpn. I use it from years.
Second I did all the online tests for vpn dns leaks that I know. All of them are good (absolutely no leaks) except this one.
This particular test: https://www.grc.com/dns/ leaks 2 dns that are not from the vpn but looks like directly from the isp I use.
I also installed the adrelanos vpn firewall and it looks like is working (if I kill openvpn everything goes down)
I use of course openvpn to connect to vpn and also I’m on linux so I use the scripts that I think everyone knows (those 3 lines with resolv-conf) to prevent leaks.
I got 2 questions. Of course like many others I do vpn -> whonix -> the world.
Is this leak only problematic in firefox? What can I do to prevent it? I installed the vpn firewall, I use the scripts. I don’t know what to do next to be more safe.
I highly suggest you on doing that test right now, to see if you have leaks or not.