$TTL 604800 @ IN SOA localhost. root.localhost. ( 1 ; Serial 604800 ; Refresh 86400 ; Retry 2419200 ; Expire 604800 ) ; Negative Cache TTL ; @ NS localhost. A 192.168.1.100 server A 192.168.1.100 www CNAME server dns CNAME server mail CNAME server ntp CNAME server proxy CNAME server ldap CNAME server ftp CNAME server news CNAME server rip CNAME server debian CNAME server