backup dhclient.conf cp /etc/dhcp3/dhclient.conf /etc/dhcp3/dhclient.conf.bak vim /etc/dhcp3/dhclient.conf #prepend domain-name-servers 127.0.0.1; Remove the comment (#) and change it to: prepend domain-name-servers 213.133.98.98 213.133.99.99 213.133.100.100; look for the domain-name-servers, and remove it: prepend domain-name-servers your.preferred.dns.server; request subnet-mask, broadcast-address, time-offset, routers, domain-name, domain-name-servers, host-name, netbios-name-servers, netbios-scope; #require subnet-mask, domain-name-servers; Restart your network /etc/init.d/networking restart