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I'm new to Ubuntu (I have Mate 22.04) and I am not able to connect to the internet anymore ( with any browser), probably caused by Proton VPN uninstall. The error messages I receive are

DNS address could not be found and DNS_Probe_Possible

My browsers can't connect. So I re-installed Proton, but it didn't solve the problem. I've succeeded to connect to the web by changing my name server address to 8.8.8.8 in the file: etc\resolv.conf - except that Ubuntu rewrote that modification, Now inside the etc/resolv.conf folder, I have a resolv.conf.d folder, and there is no nameserver address anymore, but 3 files named: Base, Head and Tail - no place to input nameserver 8.8.8.8 I can't either find a place to input that nameserver address in Ubuntu. The only browser that can connect is Thor (VPN). I'm on wired internet.

Does someone in Ubuntu community have a permanent solution for that annoying problem?

Rohit Gupta
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John White
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1 Answers1

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Thank you very much for your answer. I followed one of your chat answer for a similar problem, made a few queries you suggested on my terminal and it showed that my DNS was 8.8.8.8 !!! So my problem is now resolved; I can browse with all my browsers without DNS Possible Probe showing up. Great! Though I still cannot see any nameserver address text inside the resolvconf folder (like before the DNS broke). Only the 3 files I mentioned here above).

The query for: resolvectl status gave this output:

Global Protocols: -LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported resolv.conf mode: foreign Current DNS Server: 8.8.8.8 DNS Servers: 8.8.8.8

Link 2 (ens5) Current Scopes: none Protocols: -DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported

Link 3 (wls1) Current Scopes: none Protocols: -DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported

Link 4 (ipv6leakintrf0) Current Scopes: none Protocols: -DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported

Link 5 (proton0) Current Scopes: DNS Protocols: +DefaultRoute +LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported DNS Servers: 10.22.0.1 DNS Domain: ~.

which I don't know what it means. Thanks again!

John White
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