[dns-operations] is www.qq.com a zone?

Mark Andrews marka at isc.org
Fri Jul 1 04:26:30 UTC 2016


In message <fbfdf649-a4d5-9c39-7375-cab4eef44a0d at orange.fr>, yhpeng at orange.fr w
rites:
> Hi,
> 
> I was just not sure, I saw it does have NS defined as dig below.
> But `dig www.qq.com ns` and `dig www.qq.com soa` got nothing.
> 
> Thanks for the helps.
> 
> $ dig www.qq.com   +trace
> 
> ; <<>> DiG 9.8.1-P1 <<>> www.qq.com +trace
> ;; global options: +cmd
> .                       444967  IN      NS      k.root-servers.net.
> .                       444967  IN      NS      f.root-servers.net.
> .                       444967  IN      NS      j.root-servers.net.
> .                       444967  IN      NS      a.root-servers.net.
> .                       444967  IN      NS      m.root-servers.net.
> .                       444967  IN      NS      g.root-servers.net.
> .                       444967  IN      NS      l.root-servers.net.
> .                       444967  IN      NS      c.root-servers.net.
> .                       444967  IN      NS      h.root-servers.net.
> .                       444967  IN      NS      d.root-servers.net.
> .                       444967  IN      NS      b.root-servers.net.
> .                       444967  IN      NS      i.root-servers.net.
> .                       444967  IN      NS      e.root-servers.net.
> ;; Received 436 bytes from 172.17.1.215#53(172.17.1.215) in 15 ms
> 
> com.                    172800  IN      NS      a.gtld-servers.net.
> com.                    172800  IN      NS      b.gtld-servers.net.
> com.                    172800  IN      NS      c.gtld-servers.net.
> com.                    172800  IN      NS      d.gtld-servers.net.
> com.                    172800  IN      NS      e.gtld-servers.net.
> com.                    172800  IN      NS      f.gtld-servers.net.
> com.                    172800  IN      NS      g.gtld-servers.net.
> com.                    172800  IN      NS      h.gtld-servers.net.
> com.                    172800  IN      NS      i.gtld-servers.net.
> com.                    172800  IN      NS      j.gtld-servers.net.
> com.                    172800  IN      NS      k.gtld-servers.net.
> com.                    172800  IN      NS      l.gtld-servers.net.
> com.                    172800  IN      NS      m.gtld-servers.net.
> ;; Received 488 bytes from 198.97.190.53#53(198.97.190.53) in 244 ms
> 
> qq.com.                 172800  IN      NS      ns1.qq.com.
> qq.com.                 172800  IN      NS      ns2.qq.com.
> qq.com.                 172800  IN      NS      ns3.qq.com.
> qq.com.                 172800  IN      NS      ns4.qq.com.
> ;; Received 260 bytes from 192.26.92.30#53(192.26.92.30) in 192 ms
> 
> www.qq.com.             86400   IN      NS      ns-tel2.qq.com.
> www.qq.com.             86400   IN      NS      ns-tel1.qq.com.
> ;; Received 120 bytes from 182.140.177.149#53(182.140.177.149) in 51 ms
> 
> www.qq.com.             300     IN      A       59.37.96.63
> www.qq.com.             300     IN      A       14.17.42.40
> www.qq.com.             300     IN      A       14.17.32.211
> ;; Received 76 bytes from 14.17.44.91#53(14.17.44.91) in 9 ms
> _______________________________________________
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Both the servers for qq.com and www.qq.com are broken.

* The qq.com servers promote glue to answer for NS www.qq.com.

; <<>> DiG 9.11.0a3 <<>> www.qq.com ns +norec @ns1.qq.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 5587
;; flags: qr aa ad; QUERY: 1, ANSWER: 4, AUTHORITY: 4, ADDITIONAL: 0

;; QUESTION SECTION:
;www.qq.com.			IN	NS

;; ANSWER SECTION:
www.qq.com.		86400	IN	NS	ns-cmn1.qq.com.
www.qq.com.		86400	IN	NS	ns-tel1.qq.com.
www.qq.com.		86400	IN	NS	ns-cnc1.qq.com.
www.qq.com.		86400	IN	NS	ns-os1.qq.com.

;; AUTHORITY SECTION:
qq.com.			86400	IN	NS	ns2.qq.com.
qq.com.			86400	IN	NS	ns3.qq.com.
qq.com.			86400	IN	NS	ns4.qq.com.
qq.com.			86400	IN	NS	ns1.qq.com.

;; Query time: 283 msec
;; SERVER: 101.226.68.138#53(101.226.68.138)
;; WHEN: Fri Jul 01 14:20:33 EST 2016
;; MSG SIZE  rcvd: 187

* The www.qq.com servers don't respond to EDNS queries with options.

% dig ns www.qq.com @ns-os1.qq.com +norec

; <<>> DiG 9.11.0a3 <<>> ns www.qq.com @ns-os1.qq.com +norec
;; global options: +cmd
;; connection timed out; no servers could be reached
%

* The www.qq.com servers don't know about the NS records for www.qq.com.

% dig ns www.qq.com @ns-os1.qq.com +norec +nocookie

; <<>> DiG 9.11.0a3 <<>> ns www.qq.com @ns-os1.qq.com +norec +nocookie
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 32861
;; flags: qr aa ad; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;www.qq.com.			IN	NS

;; AUTHORITY SECTION:
www.qq.com.		300	IN	SOA	ns-tel1.qq.com. webmaster.qq.com. 1380440321 300 600 86400 300

;; Query time: 235 msec
;; SERVER: 203.205.176.58#53(203.205.176.58)
;; WHEN: Fri Jul 01 14:22:21 EST 2016
;; MSG SIZE  rcvd: 93

% 

They do however know about the SOA record.

% dig soa www.qq.com @ns-os1.qq.com +norec +nocookie

; <<>> DiG 9.11.0a3 <<>> soa www.qq.com @ns-os1.qq.com +norec +nocookie
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 57446
;; flags: qr aa ad; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;www.qq.com.			IN	SOA

;; ANSWER SECTION:
www.qq.com.		300	IN	SOA	ns-tel1.qq.com. webmaster.qq.com. 1380440321 300 600 86400 300

;; Query time: 237 msec
;; SERVER: 203.205.176.58#53(203.205.176.58)
;; WHEN: Fri Jul 01 14:23:45 EST 2016
;; MSG SIZE  rcvd: 93

% 

-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka at isc.org



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