I've followed these commands successfully : - yum install bind bind-chroot bind-libs bind-utils - service named start When I used " host x.domain.com localhost" I got : using domain name server : name : localhost address : 172.0.0.1#53 host x.domain.com not found: 2(SERVFAIL) I've changed the ip settings from (Automatic dhcp to manual ) but with the same result... --