Hey,

Yet another VPN adventure gone awry I guess. I was connecting through OpenVPN to Mullvad’s servers. Mullvad provides a custom `.config` file according to your needs, so it was no big deal (although you need to edit it a bit for further security and privacy). Some notify-send problems aside, everything seemed okay and all until I ran into an annoying DNS leakage issue.

Despite having OpenVPN configured, a nice and stable connection, DNS leakage was still a problem. While the Mullvad VPN app does a great job preventing this, I prefer using OpenVPN directly or even WireGuard in last resort since getting mullvad-vpn to work properly on any non-systemd distro is near impossible (I tried it hard). But you probably shouldn't be using any software like that anyways. So, I was left high and dry with DNS leaks.

What I Tried (And failed):
1. `resolv.conf` Tweaks:
   - Directly editing `/etc/resolv.conf` didn’t solve the leakage.

2. NetworkManager Settings:
   - I tinkered with NetworkManager settings, manually setting DNS servers, but still faced DNS leaks.

3. Mullvad custom .config file:
   - Even with Mullvad’s custom .config file, using "dhcp-option", with no results :p

Not sure what was failing, logs showed nothing relevant, I would restart the service multiple times, the VPN always resorted to the same unwanted dns server.
After struggling with the most obvious solutions, I gave up to a simple one: DNS over HTTPS in every applicable software. Instead of dealing with messy system settings, I set up DoH in my browsers and so on to use custom DNS servers. Mullvad has also some promising-looking ones in terms of privacy (https://mullvad.net/pt/help/dns-over-ht … s-over-tls). It's very trivial to do it in most browsers.

By using DNS over HTTPS in your browser, you encrypt your DNS queries, preventing them from leaking outside your VPN tunnel. Surely you may want to turn it off if not using a VPN, and it might make the connection slightly slower. Still it’s a neat, although not ideal, way to bypass the complicated system-wide configuration issues, especially when working with Devuan and SysVinit. It’s a simple fix that doesn’t really require much knowledge and work.

Has someone run into this problem? Would love suggestions :P

Note:  dnsmasq for DNS management could be a viable system-wide solution to handle this but I haven't tried it.