Most specific match on PTR records

[Robert Moskowitz]

On 02/21/2013 06:49 PM, Mark Andrews wrote:
> In message <CANYsE-zYQh7Jv4QoVM45q-w1Vz1=YBk7j=K=OoQ01UGYvw_yLw at mail.gmail.com>, Nikita Koshiko
> v writes:
>> Hello list,
>>
>>
>> I'm trying to "cut" /24 network from the scope of /8 network, here is
>> example:
>>
>>          zone "11.2.10.in-addr.arpa" {
>>                  type forward;
>>                  forwarders { 192.168.1.23; 192.168.1.24; };
>>          };
>>
>>          zone "10.in-addr.arpa" {
>>                  type master;
>>                  file "master/int/10.in-addr.arpa";
>>          };
>>
>> 10.in-addr.arpa is just a file that returns NXDOMAIN for any 10.0.0.0/8 ip
>> address. But I need to forward requests for 10.2.11.0/24 net to other dns
>> servers and the above config not working.
>> I got empty responses for 10.2.11.0/24 net.
> When I see questions like this I ask "Why are you doing this the
> most complicated way?"  Just add a delegation for 11.2.10.in-addr.arpa
> to 10.in-addr.arpa.  If you are using global forwarders turn them
> off.

ARGH!!!  Mark! Your 'problem' is you are too close to the code and see 
obvious solutions!  :)

This will make some things I do here with my 192.168 nets cleaner. Thanks.

 From the guy that started the 'net10' effort.

>
> 	zone "10.in-addr.arpa" {
> 		type master;
> 		file "master/int/10.in-addr.arpa";
> 		forwarders { /* empty */ };
> 	};
>
> 	11.2	NS  <nameserver1>.
> 	11.2	NS  <nameserver2>.
>
>> This is right: (192.168.1.8 - server with bind)
>>
>> $ host -t ptr 10.1.1.1 192.168.1.8
>> Using domain server:
>> Name: 192.168.1.8
>> Address: 192.168.1.8#53
>> Aliases:
>> Host 1.1.1.10.in-addr.arpa. not found: 3(NXDOMAIN)
>>
>> This is wrong:
>> $ host -t ptr 10.2.11.10  192.168.1.8
>> Using domain server:
>> Name: 192.168.1.8
>> Address: 192.168.1.8#53
>> Aliases:
>> Host 10.11.2.10.in-addr.arpa. not found: 3(NXDOMAIN)
>>
>> This is expected answer from the forwarded server  - 192.168.1.23
>> $ host -t ptr 10.2.11.10  192.168.1.23
>> Using domain server:
>> Name: 192.168.1.23
>> Address: 192.168.1.23#53
>> Aliases:
>> 10.11.2.10.in-addr.arpa domain name pointer hawk-agent.local.intranet.
>>
>> Can someone help with this ?
>>