FW: Delegating reverse DNS to a customer

Kevin Darcy kcd at chrysler.com
Tue Aug 18 18:32:42 UTC 2009


bsfinkel at anl.gov wrote:
> On Tue, Aug 18, 2009 at 8:31 AM, Tim Huffman<Tim at bobbroadband.com>
> wrote:
>   
>> Guys,
>>
>>
>>
>> We're a smallish (but growing) ISP, and we've been asked by one of our
>> customers to delegate reverse DNS for 63.250.251.0/24 to their DNS servers,
>> ns1.emns.com - ns4.emns.com. Unfortunately, we've never had to delegate DNS
>> to a customer before, and we're having problems getting it to work.
>>
>>
>>
>> We're running BIND 9.5.1 on Fedora.
>>     
>
> In your zone
>
>      251.250.63.in-addr.arpa   (If you do not have a zone, create it.) 
>
> place the following four NS records as delegation records:
>
> @    IN  NS  ns1.emns.com.
>      IN  NS  ns2.emns.com.
>      IN  NS  ns3.emns.com.
>      IN  NS  ns4.emns.com.
>
> I believe that that will delegate the /24 to those servers from your
> servers.  The delegation could occur at the parent level, but you
> do not control the parent
>
>      250.63.in-addr.arpa
>
> zone.
>   
No, you can't do a "sideways" delegation like that.

The correct solution, as stated elsewhere, is to get 
251.250.63.in-addr.arpa delegated directly from ARIN to the customer.

- Kevin




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