mail# cat db.10.3
$ORIGIN .
$TTL 3600       ; 1 hour
3.10.in-addr.arpa       IN SOA  mail.sr.kubkurort.ru. hostmaster.sr.kubkurort.ru. (
                                8          ; serial
                                900        ; refresh (15 minutes)
                                600        ; retry (10 minutes)
                                86400      ; expire (1 day)
                                3600       ; minimum (1 hour)
                                )
                        NS      mail.sr.kubkurort.ru.
$ORIGIN 3.10.in-addr.arpa.
$TTL 21600      ; 6 hours
2.0                     PTR     x10.gs.kubkurort.ru.
1.0                     PTR     ns.gs.kubkurort.ru




mail# cat db.gs.kubkurort.ru
$ORIGIN .
$TTL 3600       ; 1 hour
gs.kubkurort.ru         IN SOA  mail.sr.kubkurort.ru. root.mail.sr.kubkurort.ru. (
                                20071025   ; serial
                                3600       ; refresh (1 hour)
                                900        ; retry (15 minutes)
                                3600000    ; expire (5 weeks 6 days 16 hours)
                                3600       ; minimum (1 hour)
                                )
                        NS      mail.sr.kubkurort.ru.
$ORIGIN gs.kubkurort.ru.
ns                      A       10.3.0.1
$TTL 21600      ; 6 hours
x10                     A       10.3.0.2