How to Configure Reverse DNS

[nara_456]

Hi All

Can anybody suggest me on how to build reverse dns

here is my forward dns

$TTL 86400

@ IN SOA ns1.ityug.com. root.ns1.ityug.com.(
2006081401
28800
3600
604800
38400
)


IN NS ns1.ityug.com.

IN MX 10 mta.ityug.com.


; Machine Names
localhost IN A 10.0.0.3
ityug1 IN A 10.0.0.2
ityug2 IN A 10.0.0.5



and created a file rev.0.0.10.in-addr.arpa

$TTL 86400
@ IN SOA ns1.ityug.com. root.ityug.com. (
2006081401;
28800;
604800;
604800;
86400
)

IN NS ns1.ityug.com.
1 IN PTR ityug.com.
~

Did I made any miskate in Reverse DNS , Please Suggest ME