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List:       bind-users
Subject:    Re: local lookups ok, remote lookups broken.
From:       Barry Finkel <b19141 () achilles ! ctd ! anl ! gov>
Date:       2003-12-23 17:52:45
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i18rabbit@cwazy.co.uk (i18rabbit) wrote:

>i am confused as to who is at fault
>for reverse DNS lookup failures.
>i would sincerely value any help.
>
>network:
>
>A                  B                 C            D
>MyLocalGateway <-> MyISPsNetwork <-> Internet <-> RemoteServer
>
>all lookups for A when using A's DNS work fine.
>all lookups for A when using B's DNS work fine.
>reverse lookups for A when at D fail when not
> specifying any particular DNS server to use
> in a host(1) command (this problem causes my email
> from A to be rejected by mail servers that do
> reverse DNS lookups - BAD problem).
>reverse lookups for A when at D work fine only when
> specifying B's DNS servers in a host(1) command.
>
>there is no problem locating A in any browser/ftp/etc,
>from any location, whether numeric or "human-readable"
>forms are used when specifying A's location.
>
>who's fault is it that reverse dns lookups for A
>do not work from remote servers on the Internet?

If you told us some more details - 

   1) What are the nodenames of machines A, B, C, and D?
   2) What reverse addresses are giving problems?

With these pieces of information, we could re-charge our crystal balls
and give you advice after we did some queries on our own.
----------------------------------------------------------------------
Barry S. Finkel
Computing and Instrumentation Solutions Division
Argonne National Laboratory          Phone:    +1 (630) 252-7277
9700 South Cass Avenue               Facsimile:+1 (630) 252-4601
Building 222, Room D209              Internet: BSFinkel@anl.gov
Argonne, IL   60439-4828             IBMMAIL:  I1004994


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