In message <4e17bc15.1090...@lcrcomputer.net>, Lyle Giese writes: > On 07/08/11 20:07, Feng He wrote: > > Hello list, > > > > > > $ dig www.qq.com ns @ns1.qq.com > > > > ;<<>> DiG 9.4.2-P2.1<<>> www.qq.com ns @ns1.qq.com > > ;; global options: printcmd > > ;; Got answer: > > ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 50734 > > ;; flags: qr aa rd; QUERY: 1, ANSWER: 2, AUTHORITY: 4, ADDITIONAL: 0 > > ;; WARNING: recursion requested but not available > > > > ;; QUESTION SECTION: > > ;www.qq.com. IN NS > > > > ;; ANSWER SECTION: > > www.qq.com. 86400 IN NS ns-tel1.qq.com. > > www.qq.com. 86400 IN NS ns-tel2.qq.com. > > > > ;; AUTHORITY SECTION: > > qq.com. 86400 IN NS ns4.qq.com. > > qq.com. 86400 IN NS ns1.qq.com. > > qq.com. 86400 IN NS ns2.qq.com. > > qq.com. 86400 IN NS ns3.qq.com. > > > > ;; Query time: 7 msec > > ;; SERVER: 219.133.62.252#53(219.133.62.252) > > ;; WHEN: Sat Jul 9 08:58:38 2011 > > ;; MSG SIZE rcvd: 144 > > > > > > > > > > $ dig www.qq.com ns @ns-tel1.qq.com > > > > ;<<>> DiG 9.4.2-P2.1<<>> www.qq.com ns @ns-tel1.qq.com > > ;; global options: printcmd > > ;; Got answer: > > ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 44393 > > ;; flags: qr aa rd; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0 > > ;; WARNING: recursion requested but not available > > > > ;; QUESTION SECTION: > > ;www.qq.com. IN NS > > > > ;; AUTHORITY SECTION: > > qq.com. 86400 IN SOA ns1.qq.com. > > webmaster.qq.com. 1293074536 300 600 86400 86400 > > > > ;; Query time: 7 msec > > ;; SERVER: 121.14.73.115#53(121.14.73.115) > > ;; WHEN: Sat Jul 9 08:59:07 2011 > > ;; MSG SIZE rcvd: 78 > > > > > > > > > > I have two questions against the two dig info above. > > > > First, why ns1.qq.com (which is the authority nameserver for the zone > > of qq.com, not www.qq.com) returns the authority answer for > > www.qq.com's NS query? and even includes a AA flag in the response. > > qq.com zone is the parent to the subdomain www.qq.com, so it has to have > knowledge of the name servers for the www.qq.com subdomain. That is how > a recursive name server finds www.qq.com.
But it isn't returning a referral when it should (the NS records are in the wrong section) and as it isn't configured to server www.qq.com the "aa" is wrong. > > Second, why ns-tel1.qq.com (which is the authority nameserver for the > > zone of www.qq.com) returns nothing for this zone's NS query? > > Misconfiguration of ns-tel1.qq.com or it's not allowed to give you that > answer. Hard to tell from here. > > The view from here does not show ns-tel1.qq.com to be authorative for > www.qq.com. > > Lyle Giese > LCR Computer Services, Inc. > _______________________________________________ > 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 -- Mark Andrews, ISC 1 Seymour St., Dundas Valley, NSW 2117, Australia PHONE: +61 2 9871 4742 INTERNET: ma...@isc.org _______________________________________________ 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