I have wasted the last 2.5 hours trying to see where I went wrong with my configuration and I just can't.
For the record, I am running OpenSuse Tumbleweed with Gnome, latest update for everything. Up to now I have been using AdGuard as my DNS resolver, but am now trying to switch to Mullvad but at this point I think I probably don't want to anymore. Reason being, I just can not get it to work for the life of me.
My system has NetworkManager installed so I go there, select my connected Wifi, and enter Mullvad's DNS address 194.242.2.4 in thr IPv4 section, then I go to check to see if it shows I am using their DNS and it Firefox AND Vivaldi give no internet connection errors. I go back to Adguard DNS and my internet is back working again. I go back to Mullvad, you guessed it, no internet once again. I even tried Cloudflare and Quad 9's DNS addresses and both of those worked as well but Mullvad's just does not want to work and I am going insane over it.
And no I can not edit resolv.conf through the terminal because NetworkManager will override it and no I don't want to delete NetworkManager. Any feedback would be appreciated.
Edit: I have Mullvad DNS on my phone and got it running with zero issues so this is more of a Linux problem than a Mullvad DNS problem I think.
Solution:
Open terminal and follow through
sudo zypper install systemd-network
sudo nano /etc/systemd/resolved.conf
Copy paste this into the file that you just opened and change the DNS to whichever DNS provider you are using.
[Resolve]
DNS=194.242.2.4 2a07:e340::4
FallbackDNS=194.242.2.2 2a07:e340::2
Domains=~.
DNSSEC=yes
DNSOverTLS=opportunistic
#MulticastDNS=no
#LLMNR=no
#Cache=yes
#CacheFromLocalhost=no
#DNSStubListener=no
#DNSStubListenerExtra=
#ReadEtcHosts=yes
#ResolveUnicastSingleLabel=no
Ctrl + O to write out and Ctrl + X to exit back to the terminal main page.
ln -sf ../run/systemd/resolve/stub-resolv.conf /etc/resolv.conf
sudo systemctl start systemd-resolved
sudo systemctl enable systemd-resolved
sudo systemctl restart NetworkManager
Boom it should be working now.
Thank you. The downvotes don’t bother me, but the attitude of some of these linux fans does. Skills issues my ass. I’m fairly IT literate. I can find my way around basic unix stuff for work, and don’t care if i have to spend some of the time i get paid for on reading man pages. But at home, my computer just needs to work. Linux is not ready for that, and some of these fanboys just put people off.
Fr, and I was never the one that started complaining first saying Linux is difficult. I just came here to ask for advice and then you commented that stuff like this is why you don't feel comfortable switching to Linux yet, and then you get attacked and I get indirectly attacked by these toxic nerds saying "okay enjoy getting spied on" or "read the fucking manual" or "skill issue". Yea this is totally productive to the Linux community yea right.