Ignore DNS from DHCP server in Ubuntu

Question

I set static DNS in /etc/resolvconf/resolv.conf.d/base file:

nameserver 8.8.8.8
nameserver 8.8.4.4

But my PC still obtains DNS from DHCP, this is my /etc/resolv.conf:

nameserver 192.168.100.2 
nameserver 8.8.8.8
nameserver 8.8.4.4

How to ignore obtained DNS from DHCP server?

Answer 1

You can add this line to your /etc/dhcp/dhclient.conf:

supersede domain-name-servers 8.8.8.8, 8.8.4.4;

Then restart network or run dhclient to make changes.

From man dhclient.conf:

The supersede statement

       supersede [ option declaration ];

       If for some option the client should always  use  a  locally-configured
       value  or  values rather than whatever is supplied by the server, these
       values can be defined in the supersede statement.