Strange DNS PTR records
charles.tryon at gmail.com
Wed Jun 5 14:18:28 MDT 2013
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, 10.4.0.0.100,
or 10.4.2.2.10. 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
- 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. :-( )
“Risks are not to be evaluated in terms of the probability of success,
but in terms of the value of the goal.”
- Ralph D. Winter
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