Hi guys i have a problem getting my reverse dns lookup to work but forward lookup is ok. I configure it on my centos box, this is standalone box, here is my configs:

server ip is 172.16.0.2

named.conf


options {
directory "/var/named/"
};

zone "fakedomain.net" IN {
type master;
file "forward";
allow-query { any; };
};

zone "0.0.172.in-addr.arpa IN {
type master;
file "reverse";
allow-query { any; };
};

reverse:

$TTL 84600
@ IN SOA server.fakedomain.net. root.fakedomain.net (
1
2h
3h
4h
5h )

IN NS server
2 IN PTR server


The error that i get from the logs is that

"network unreachable resolving 2.0.16.172.in-addr.arpa/PTR/IN :

Hi,

First of all you should find out why you get a "network unreachable ...". Maybe the name server is not running due to errors, or there is a firewall blocking connetctions etc.

Now regarding your configuration, there are some errors:
In named.conf:
You miss the closing double quotes " in the zone name.
Also since your network is 172.16.0.0, the zone name should be 0.16.172.in-addr.arpa

In the zone file:
You have to give the FQDNs of the PTR records (not just a hostname) and don't forget the trailing dot. The following should work:
Regards

Hi Sorry for the typo, i have made corrections but still issue persist... this is a stand alone server and its not connected to any network. upon checking the logs the error is the same but this time its unable to reach the root servers, how come its checking the root servers?

Hi,

You should post again the edited named.conf and the zone files, so we can tell what's wrong. And please use the CODE tags for this.
Also make sure that there is an A record for server.fakedomain.net in the forward zone.

Regards

Try to find everything is right, use the command dig