[dns-operations] does it matter when nameserver recs have non-matching PTRs ?
marius at hi.is
Tue Aug 4 09:44:43 UTC 2015
> > I don't recall that there is any prohibition on multiple PTR records
> there is, softly. RFC 1035 says that the PTR points to the canonical
> name of a host, like a CNAME.
From RFC2181 (Clarifications to the DNS Specification)
"10.2. PTR records
Confusion about canonical names has lead to a belief that a PTR
record should have exactly one RR in its RRSet. This is incorrect,
the relevant section of RFC1034 (section 3.6.2) indicates that the
value of a PTR record should be a canonical name. That is, it should
not be an alias. There is no implication in that section that only
one PTR record is permitted for a name. No such restriction should
University of Iceland
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