Reverse address entries

Matus UHLAR - fantomas uhlar at
Mon Jul 1 09:50:02 UTC 2013

>> On Jun 28, 2013, at 10:54 AM, "Ward, Mike S" <mward at> wrote:
>> > Hello all, is there any reason to setup reverse address entries for a zone?

>In article <mailman.710.1372442831.20661.bind-users at>,
> Charles Swiger <cswiger at> wrote:
>> Certainly.  Various software performs what's called a double-reverse lookup
>> to confirm that the A and PTR records match.

On 01.07.13 10:48, Sam Wilson wrote:
>Isn't that paranoid reverse lookup?  Since reverse lookups can be faked
>(I'll spare the details here) some uses of also require a
>subsequent forward lookup.  If there is no PTR record then the double
>lookup doesn't happen.  I don't know of anything to be gained by
>requiring a reverse lookup after a forward lookup.

He apparently meant exactly the same. Also calles FcRDNS - "forward
confirmed" or "full circle" reverse DNS.

Matus UHLAR - fantomas, uhlar at ;
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