$TTL 604800 @ IN SOA localhost. root.localhost. ( 1 ; Serial 604800 ; Refresh 86400 ; Retry 2419200 ; Expire 604800 ) ; Negative Cache TTL ; @ NS localhost. ; gateway A 192.168.1.1 server A 192.168.1.2 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