2 $TTL 38400 ; 10 hours 40 minutes
3 _REV_PRIVATE_NET.in-addr.arpa IN SOA _MY_HOSTNAME.domain.org. root.domain.org. (
5 10800 ; refresh (3 hours)
7 604800 ; expire (1 week)
8 38400 ; minimum (10 hours 40 minutes)
12 $ORIGIN _REV_PRIVATE_NET.in-addr.arpa