Database Software

hi,

i'm tring to build a dns server for rac installation, dns server was built on rac1.abc.com with ip:192.168.1.101
after configuration, when using nslookup rac1, it works, and show ip information and so on,
but when using nslookup and ip address, like nslookup 192.168.1.101

it does't works, the message show below:

** server can't find 101.1.168.192.in-addr.arpa.: NXDOMAIN

why? can any one tell me the reason.

here is my zone file named 101.1.168.192.in-addr.arpa

ORIGIN 1.168.192.in-addr.arpa.
$TTL 1H
@ IN SOA abc.com. root.abc.com. (
1997022709 ; Serial
28800 ; Refresh
14400 ; Retry
3600000 ; Expire
86400 ) ; Minimum
1.168.192.in-addr.arpa. IN NS abc.com.

101 IN PTR rac1.abc.com.
...
...

==== named.rfc1912.zones information

zone "1.168.192.in-addr.arpa" IN {
type master;
file "1.168.192.in-addr.arpa";
allow-update { none; };

};

==== /etc/resolv.conf
domain abc.com
search abc.com
nameserver 192.168.1.101

thanks in advance.