Removing DNS settings from your Linux machine
Click at the Wireless or Ethernet logo and choose EditConnections.
Select your Wireless or Ethernet network if your computer is hardwired and choose Edit.
In the network settings, select IPv4 Settings.
Method: Automatic (DHCP) addresses only
DNS Servers: Remove the DNS IPs set here and click on Save.
Reboot your machine.
If you have any problems, please email us at email@example.com , and try to include any errors and a full description of the fault.
We'll get back to you as soon as possible to assist you.