On 2020-06-18 11:14 p.m., Benoît Panizzon via mailop wrote:
Hi Michael
And when you say 'only one PTR per RR' is "allowed", could you
explain that further? "allowed" by whom, or what policy.
I recall we ran into some problems with systems that attempt to match A
and PTR records and only considered the first PTR returned and that
while looking if that was correct behaviour, I found an RFC hinting that
only one PTR per RR is allowed.
But let's dig into those RFC :-)
https://tools.ietf.org/html/rfc1034 Section 3.6.2 Aliases and canonical
names..
hint to that an PTR should point to only one ressource.
https://tools.ietf.org/html/rfc2181 Section 10.2.
Confusion about canonical names has lead to a belief that a PTR
record should have exactly one RR in its RRSet. This is
incorrect,
[...]
Ok, I was wrong :-)
Takes a big man to admit he is wrong ;)
But the day we stop learning, is the day we should roll over..
--
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