$TTL 604800 @ IN SOA localhost. root.localhost. ( 1 ; Serial 604800 ; Refresh 86400 ; Retry 2419200 ; Expire 604800 ) ; Negative Cache TTL ; @ IN NS localhost. ; gateway IN A 192.168.90.2 www IN CNAME gateway dns IN CNAME gateway mail IN CNAME gateway ntp IN CNAME gateway proxy IN CNAME gateway ldap IN CNAME gateway ftp IN CNAME gateway news IN CNAME gateway rip IN CNAME gateway