DNS Probe Possible - DNS address could not be found

[ricmarques]

Hi, @Abraxus

You wrote:

@Abraxus

Hi jaybo! Thank you for your answer. Unfortunately these two commands didn't do anything. I found that if I change my iPv4 address to 8.8.8.8 , that could solve the DNS problem. Does someone knows how to do that on Ubuntu Mate 22.04?

I suggest that you check the following discussion here in the Ubuntu MATE Community discussion forums, started by @alpinejohn a few months ago (on 22 January 2023):

How can you change DNS servers on Ubuntu-Mate 22.04 (e.g. for a pi-hole)?

Hello I have looked on the internet and have come to the conclusion that Ubuntu-Mate 22.04 does not have a GUI element for easily setting the DNS server(s). However, some other desktop-environments do. Furthermore, my investigations suggest that on Ubuntu-Mate 22.04 systemd looks after DNS server settings, and that changing any systemd DNS server settings via the terminal is a daunting task with a serious risk of things going wrong. Have I overlooked something? Is there an easy way to change…

... and, specifically, read the following answer in that topic posted by @tkn (thom) that I think will solve your issue of setting up a network connection in Ubuntu MATE to use a specific DNS Server IP address:

How can you change DNS servers on Ubuntu-Mate 22.04 (e.g. for a pi-hole)?

I also use a custom DNS, it is actually quite ease to select another one: Click the network icon on the taskbar. select: Edit Connections -> (select the connection of your choice) -> cogwheel change Method to "Automatic (DHCP) addresses only" fill in your dns-address** on the line "DNS servers" ** if you want more dns-addresses, seperate them with a comma. [DNS] In this example you see 127.0.2.1 as DNS because I have a DNS-crypt-proxy locally but you can fill in any legitimate DNS addres…

I hope this helps