It works because they're not using BIND. Whatever they're using doesn't enforce rules for CNAME records.
I would expect it to give inconsistent results, but I'm not 100% sure. Running some queries, I'm seeing where the query results aren't always being cached correctly, but I can't see how the bad effects would go any further than that. Perhaps someone else can explain how this misbehaves in this particular situation. Chris Buxton BlueCat Networks On Sep 18, 2012, at 8:08 AM, M. Meadows wrote: > > Why / how does this work? > > dig -t any www.careerone.com.au @ns2.tmpw.net. > > ; <<>> DiG 9.3.6-P1-RedHat-9.3.6-20.P1.el5_8.2 <<>> -t any > www.careerone.com.au @ns2.tmpw.net. > ;; global options: printcmd > ;; Got answer: > ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 15513 > ;; flags: qr aa rd; QUERY: 1, ANSWER: 5, AUTHORITY: 0, ADDITIONAL: 3 > > ;; QUESTION SECTION: > ;www.careerone.com.au. IN ANY > > ;; ANSWER SECTION: > www.careerone.com.au. 2560 IN SOA ns1.tmpw.net. > hostmaster.tmpw.net. 1347892090 16384 2048 1048576 2560 > www.careerone.com.au. 14400 IN NS ns1.tmpw.net. > www.careerone.com.au. 14400 IN NS ns2.tmpw.net. > www.careerone.com.au. 14400 IN NS ns3.tmpw.net. > www.careerone.com.au. 600 IN CNAME > www.careerone.com.au.edgesuite.net. > > ;; ADDITIONAL SECTION: > ns1.tmpw.net. 3600 IN A 208.71.198.33 > ns2.tmpw.net. 3600 IN A 63.121.30.233 > ns3.tmpw.net. 3600 IN A 208.71.198.34 > > ;; Query time: 81 msec > ;; SERVER: 63.121.30.233#53(63.121.30.233) > ;; WHEN: Tue Sep 18 08:48:30 2012 > ;; MSG SIZE rcvd: 240 > > > I thought a cname record can't coexist with any other records in a zone file. > How does this even get loaded this way? What results should the owners of > this domain expect? I assume they'll be inconsistent and problematic. Right? > > Thanks! > > > > > _______________________________________________ > Please visit https://lists.isc.org/mailman/listinfo/bind-users to unsubscribe > from this list > > bind-users mailing list > bind-users@lists.isc.org > https://lists.isc.org/mailman/listinfo/bind-users
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