Multiple A and PTR and the "main" ones?

Matus UHLAR - fantomas uhlar at
Fri Sep 11 13:48:32 UTC 2015

>>On 09/11/2015 02:10 PM, Reindl Harald wrote:
>>>just don't specifiy more than one PTR for a IP

>Am 11.09.2015 um 14:14 schrieb Marek Kozlowski:
>>Specifying multiple CNAMEs for the same alias is not possible

On 11.09.15 14:22, Reindl Harald wrote:
>no idea what that means, a CNAME can point to anotehr CNAME in circles

that's true, however not recomended.
It's also possible to have multiple CNAMEs pointing to the same record,
which I would recommend.

>>defining more than one PTR for the same IP is possible I believe there
>>is some reason for it.

>>I think sometimes I might be useful. Is it a bad practice?
>it is a bad practice and leads exactly to the problems you describe 
>when the other side tries to verify A/PTR matching because there is 
>just no ordering like there is also no rodering having multiple A 
>records for the same name with different IP's


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