NetworkManager DNS Mode Must Be Must Configured
Ubuntu 22.04
Ensure 'dns' is configured with value 'none|default' in section 'main' in /etc/NetworkManager/NetworkManager.conf
/etc/NetworkManager/NetworkManager.conf
^\s*\[main\].*(?:\n\s*[^[\s].*)*\n^[ \t]*dns\h*=\h*(.+?)[ \t]*(?:$|#)
1
^none|default$
/etc/NetworkManager/conf.d
.*\.conf$
^\s*\[main\].*(?:\n\s*[^[\s].*)*\n^[ \t]*dns\h*=\h*(.+?)[ \t]*(?:$|#)
1
^none|default$
^/etc/NetworkManager/NetworkManager.conf