$TTL    86400
@       IN      SOA   ia b (
                                      1997022700 ; Serial
                                      28800      ; Refresh
                                      14400      ; Retry
                                      3600000    ; Expire
                                      86400 )    ; Minimum
            IN      NS      lzf.com
234       IN      PTR   rac-scan.lzf.com
1         IN       PTR    dns.lzf.com

$TTL    86400
@               IN SOA   lzf.com    root.lzf.com (
                                        42              ; serial (d. adams)
                                        3H              ; refresh
                                        15M             ; retry
                                        1W              ; expiry
                                        1D )            ; minimum

             IN NS  lzf.com
rac-scan IN A 192.168.1.234
dns IN A 192.168.1.1