* Mark Andrews: > In message <87bmz3p4lt....@mid.deneb.enyo.de>, Florian Weimer writes: >> * Robert Edmonds: >> >> > I think there was already a thread on this topic recently on this list >> > ("Order of CNAME and A in Authoritative Reply" from August 2015). There >> > was some discussion over "adding" versus "appending" and it was pointed >> > out that a lot of existing code (e.g., the BSD stub resolver) was >> > written using the "add at the end" meaning. >> >> Are there stub resolvers which actually chase the CNAME chain? >> >> I assume it is quite common just to check the QNAME, and then extract >> A/AAAA records from the answer section without matching their owner >> names (but potentially recording their owner name as the canonical >> name of the host, even though that's rarely useful these days). > > No. libresolv has checked the owner names of the A (and AAAA) > records for decades now skipping any records that don't match.
Okay. Is it necessary to retain those checks and even fix them to avoid the CNAME ordering assumption? _______________________________________________ DNSOP mailing list DNSOP@ietf.org https://www.ietf.org/mailman/listinfo/dnsop