Reverse address entries
Matus UHLAR - fantomas
uhlar at fantomas.sk
Mon Jul 1 13:14:10 UTC 2013
>> >In article <mailman.710.1372442831.20661.bind-users at lists.isc.org>,
>> > Charles Swiger <cswiger at mac.com> wrote:
>> >> Certainly. Various software performs what's called a double-reverse
>> >> lookup
>> >> to confirm that the A and PTR records match.
>In article <mailman.718.1372672345.20661.bind-users at lists.isc.org>,
> Matus UHLAR - fantomas <uhlar at fantomas.sk> wrote:
>> He apparently meant exactly the same. Also calles FcRDNS - "forward
>> confirmed" or "full circle" reverse DNS.
On 01.07.13 14:11, Sam Wilson wrote:
>OK. So what Mr. Swiger refers to is not relevant - it's no reason to
>add PTR records.
Yes, it is.
"Various software performs what's called a double-reverse lookup to confirm
that the A and PTR records match."
It means that various software checks your PTR and then A (or maybe
AAAA) records, and can fail if eny of them is not found ot rhe latter result
doesn't match the original IP address.
Now that IS a reason to add PTR for IP address, and they must point to
hostnames that point to the same IP.
Matus UHLAR - fantomas, uhlar at fantomas.sk ; http://www.fantomas.sk/
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