Arch Linux @lemmy.ml Molecular0079 @lemmy.world 2y ago

[SOLVED] Anyone else getting DNS leaks when running VPN on Archlinux?

I tried both Mullvad and Mozilla VPN and when I do a dns test, both are still using my ISP's DNS instead of the VPN's. This only happens on my Arch systems, works fine on my phone.

EDIT: Turns out these VPN clients depend on systemd-resolved in order to change your DNS. Enabling the service makes it work properly. A bit scary that they don't give you a warning that you're leaking DNS if you don't have systemd-resolved enabled.

6 comments

Are you using systemd-resolved and systemd-networkd? If so, have you checked and double checked you set up your config with the appropriate lines in /etc/systemd/resolved.conf and /etc/systemd/network/*.network?

Also make sure to reload the appropriate systemd unit files after changing network and DNS configuration (you don't have to restart).

Maybe this can help?

https://wiki.archlinux.org/title/Domain_name_resolution
- No, I am not using either of those. Both are shown as disabled in systemctl.
  
  Then are you using NetworkManager? Or dhcpcd? As there are a few ways to resolve DNS on Linux so it depends on what you're using.
  
  Have you looked into /etc/resolv.conf ? Whichever method you're using for your network configuration might be overwriting the defaults in there.
  
  edit: letter

6 comments