Setting reverse DNS in Bind in Debian

If you have a simple DNS setting without Reverse DNS, this might help you to setup.

Step 1: Add Reverse zone entery in /etc/bind/named.conf
// add local zone definitions here

zone "0.168.192.in-addr.arpa" {
type master;
file "/etc/bind/yourdomain.rev";


zone "yourdomain.com" {
type master;
file "/etc/bind/yourdomain.com";
allow-query { any; };

Step 2: Create the /etc/bind/yourdomain.rev file

$TTL 3000
@ IN SOA ns.yourdomain.com. postmaster.yourdomain.com. (
1312 ; Serial
300 ; Refresh
150 ; Retry
4W ; Expire
1H ) ; Negative Cache TTL

;
; NS
;

IN NS ns.yourdomain.com.


1 IN PTR www.yourdomain.com.
2 IN PTR mail.yourdomain.com.


Step 3: Reload the configuration
/etc/init.d/bind force-reload


Step 4: Test the Reverse lookup
before doing that make sure your DNS is right one in /etc/resolve.conf file,

#dnslookup
> mail.yourdomain.com
Server: 192.168.0.1
Address: 192.168.0.1#53

Non-authoritative answer:
Name: mail.yourdomain.com
Address: 192.168.0.2
> 192.168.0.2
Server: 192.168.0.1
Address: 192.168.0.1#53

2.0.168.192.in-addr.arpa name = mail.yourdomain.com.

http://www.debuntu.org/2006/08/05/85-how-to-setting-up-a-dns-zone-with-bind9/2