Domain controller unable to dynamically add/update PTR record

Barry Finkel b19141 at
Wed Jan 26 14:41:40 UTC 2005

"Smith, William E. (Bill), Jr." <Bill.Smith at> wrote:

>In our environment, we have allowed Windows domain controllers to
>dynamically update their A & PTR records within the Windows only
>domains.  I'm currently troubelshooting a problem where a couple DC's
>register their A records fine but fail when trying to do their PTR
>records.  After sifting through the various server logs, I came across
>the following error which I believe is at the core of the problem since
>I had a Windows admin do an ipconfig /registerdns on the DC to force it
>to re-register its records and noted that this error appeared within
>seconds after that attempt.  
>update.log:Jan 24 11:45:24.901 info: client
>updating zone '
>': update failed: 'RRset exists (value dependent)'
>prerequisite not satisfied (NXRRSET)
>While it's clear that the problem is related to a prerequisite not being
>met, it's not clear to me what exact prerequisite has failed to be
>satisifed.  Can anyone shed any light here?  I know this is a common
>problem with DHCP clients but DHCP is not involved here.  FWIW, the
>primary DNS server where these updates are coming into is a QIP DNS
>server.  I'll provide any further info as needed/requested.

You can always run a packet sniffer on the BIND box to see exactly what
DDNS packets are being sent from the DC.  I am not sure if querylog
in BIND will give that information.  Are there any Windows Event Log
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
Argonne, IL   60439-4828             IBMMAIL:  I1004994

More information about the bind-users mailing list