Brave and Vivaldi don't connect to internet with mullvad vpn

User Support
1

Hello to everyone.
Im facing with a problem using brave browser or vivaldi browser using a VM (both fedora or deb) linked to a netVM mullvadVPN. Firefox works really well and mullvad vpn works fine too. When I utilize other browser like Brave it says “this site can’t be reached, try - checking the connection - checking the proxy and the firewall”.
I tried to changes a lot of settings, removed extensions, set no proxy… but nothing.
It can be useful, i set my mullvad vpn following this guide: Mullvad on Qubes OS 4.

Thank you :pray:

2

My guess is you have a DNS problem, and Firefox is configured to do its own DNS resolving using DoH or DoT.

In the web browser qube, open a terminal and try

ping qubes-os.org

does it display an IP?

3

yes, it shows me the ip address

4

Do you have Qubes OS 4.1?
This guide shouldn’t work for Qubes OS 4.2:

iptables rules are no longer effective in Qubes OS 4.2.0 and newer.

5

I have Qubes 4.2

6

This Qubes 4.2 guide should work for you:

If you want a non-GUI setup I would recommend this wireguard guide:

In this guide you will also find a very simple solution for VPN harding: