To change the DNS server settings on Linux using Network Manager, please follow these instructions:
First, disconnect the VPN. Then right click on the icon for our VPN client, click Settings, click Network, select the drop-down menu under Name Servers and select Use Existing DNS.
Step 1: Go to "System Settings"
Step 2: Click on "Network"
Step 3: Select the NON-VPN connection
Step 4: Click "Configure"
Step 5: Click on "Method" and set it to "Automatic (DHCP) addresses only"
Step 6: Enter our DNS servers 126.96.36.199 and 188.8.131.52
Step 7: Click Save