Fix DNS Leaks on Linux

Step #1: Click the Network/ Wi-Fi icon and open the Wired/ Wi-Fi settings.

Step #2: Open Wired/ Wi-fi settings.

Step #3: Click IPv4 and Disable the “Automatic” toggle switch next to “DNS”.

Step #4: Enter the desired DNS addresses separated by a comma such as 1.1.1.1,1.0.0.1 and click on Apply.

some popular DNS addresses:

8.8.8.8,8.8.4.4
1.1.1.1,1.0.0.1
208.67.222.222,208.67.220.220