On Wed, Jun 02, 2010 at 03:40:31PM +0000, Paul Vixie wrote: > Chris Thompson <c...@cam.ac.uk> writes: > > > Nothing that I can see. Maybe dnsviz can't cope with multiple PTR > > records in an RRset, as your first case has? (On the other hand it > > handles multiple A records in forward zones OK.) > > to be fair, multiple PTR RRs is something we added in BIND gethostbyaddr() > in more or less direct contravention to RFC 1034. if dnsviz doesn't handle > it (and i don't know if it doesn't) then it's not dnsviz's fault at all > since the DNS RFC's say that there will only be one PTR RR at an in-addr.
Vixie, not to presume to argue with you about what Paul M meant by that, but in RFC 2181 Elz and Bush say: 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 be inferred. That having been said, I always feel better, myself, when there is a 1-to-1 mapping. -- /*********************************************************************\ ** ** Joe Yao j...@tux.org - Joseph S. D. Yao ** \*********************************************************************/ _______________________________________________ bind-users mailing list bind-users@lists.isc.org https://lists.isc.org/mailman/listinfo/bind-users
