Hi Everyone..
Long time fan of Mullvad. I have what I suspect is an easy question...
I have an internal DNS server for all my bits and pieces internally. All hosts are Ubuntu desktops/servers. Obviously the VPN doesn't care about the internal DNS unless I actually enter the local DNS server in the Mullvad client. Doing that works fine.. It also works fine when the client is disconnected.
However, it also means that the DNS is leaking to my ISP (or whomever I choose to send my upstream DNS requests to). What is the best way to fix this?
As I mentioned, everything is Ubuntu, no Windows, including the DNS server (Bind9 proper, not Pihole or such). I suspect I could just send them to Mullvad but then I would be leaking DNS as standard UDP based DNS is not encrypted.