Reverse lookup problem

Kevin Darcy kcd at daimlerchrysler.com
Thu Jan 20 02:36:08 UTC 2000


raymond_00 at hotmail.com wrote:

> I have a question for anyone out there that might have an answer.
> Whenever i try and do a reverse lookup for one of my class c from
> another class c, it works for some, but not ALL the addresses.  The
> reverse zone file is configured correctly, and locally the reverse
> lookups work fine . . . remotely, however, the lookups work only some
> of the times.  The real TWIST here is that when i do a reverse lookup
> on an ip, it doesn't come up.  But when i STOP then START the named
> back up again and attempt a reverse lookup on that same ip, it will
> WORK!!!!  What's going on?  I'm sure it's a simple problem, but i can't
> figure it out.

Sounds like one or more of the slaves for the reverse zone is out of synch
with the master. Whenever a query is sent to that slave, for a PTR it
doesn't have, it'll respond authoritatively that the PTR doesn't exist.
Restart named, the next query goes to a "good" slave, or the master, and
the PTR resolves. Hence the inconsistent behavior.

Do an SOA query to the master and all of the slaves. Do the serial numbers
match? Did the Y2K change cause a serial number integer overflow, by any
chance?


- Kevin





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