FW: Delegating reverse DNS to a customer

bsfinkel at anl.gov bsfinkel at anl.gov
Tue Aug 18 15:42:47 UTC 2009

On Tue, Aug 18, 2009 at 8:31 AM, Tim Huffman<Tim at bobbroadband.com>
> Guys,
> We're a smallish (but growing) ISP, and we've been asked by one of our
> customers to delegate reverse DNS for 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


Barry S. Finkel
Computing and Information Systems Division
Argonne National Laboratory          Phone:    +1 (630) 252-7277
9700 South Cass Avenue               Facsimile:+1 (630) 252-4601
Building 222, Room D209              Internet: BSFinkel at anl.gov
Argonne, IL   60439-4828             IBMMAIL:  I1004994

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