Strange DNS PTR records

Günter Kukkukk linux at
Thu Jun 6 05:30:23 MDT 2013

Am Mittwoch, 5. Juni 2013, 22:18:28 schrieb Charles Tryon:

Hello Charles,
> Another question regarding DNS:
> I have a test domain I provisioned quite a while ago (probably shortly
> before the final 4.0.0 release, but I don't remember exactly when).  It is
> currently set up to use BIND 9.9 for DNS.  Most things are running fine on
> it (though admittedly it doesn't get pushed very hard).
> When I look at the domain using the DNS manager from Windows Remote
> Management Tools set (from a Win7 client), I the forward lookup zone looks
> fine, but I see a bunch of strange PTR records.  Almost all the PTR records
> have five octets rather than the normal four -- for example,,
> or  In all cases, the third and fourth positions are the same.
>  (We are using a /19 subnet.)  The really bizarre thing is that if I try to
> delete the records, I get an error back that the records "do not exist."
> Is this an example of the "zombie DNS records" which I've seen mentioned
> here?

No, this seems to be a different issue.

I assume, you've already done a valid kinit. Otherwise add "-U Administrator"
at the end. 
Please post the outcome of:
samba-tool dns zonelist your_dns_server

One reverse zone like "" should be listed.
Now use:
samba-tool dns query your_dns_server @ ALL

Post this outcome, too.

Cheers, Günter

>  - If it is, what is the best way to clean this up?
>  - If I use the "samba_upgradedns" command, will that purge/rebuild/fix the
> DNS database, or will it simply change the front end (BIND vs. Internal)
> server which is looking at the same back end database?
> (Re-provisioning this box from scratch isn't entirely out of the question,
> since it is a test server, but it would be a big pain to reconstruct the
> domain, especially the machine accounts.  :-( )
> Thanks!

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