Check that www.tunet.edu.cn exists for IPv4 in case we have a typo on the domain name. Use dig to query the local name server (::1).


; <<>> DiG 9.4.1-P1 <<>> +trace +all tunet.edu.cn soa
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 828
;; flags: qr ra; QUERY: 1, ANSWER: 13, AUTHORITY: 0, ADDITIONAL: 14

;; QUESTION SECTION:
;.				IN	NS

;; ANSWER SECTION:
.			220025	IN	NS	a.root-servers.net.
.			220025	IN	NS	j.root-servers.net.
.			220025	IN	NS	l.root-servers.net.
.			220025	IN	NS	b.root-servers.net.
.			220025	IN	NS	d.root-servers.net.
.			220025	IN	NS	i.root-servers.net.
.			220025	IN	NS	g.root-servers.net.
.			220025	IN	NS	f.root-servers.net.
.			220025	IN	NS	h.root-servers.net.
.			220025	IN	NS	m.root-servers.net.
.			220025	IN	NS	e.root-servers.net.
.			220025	IN	NS	c.root-servers.net.
.			220025	IN	NS	k.root-servers.net.

;; ADDITIONAL SECTION:
a.root-servers.net.	89348	IN	A	198.41.0.4
a.root-servers.net.	89348	IN	AAAA	2001:503:ba3e::2:30
b.root-servers.net.	47612	IN	A	192.228.79.201
c.root-servers.net.	435396	IN	A	192.33.4.12
d.root-servers.net.	393745	IN	A	128.8.10.90
d.root-servers.net.	393745	IN	AAAA	2001:500:2d::d
e.root-servers.net.	44932	IN	A	192.203.230.10
f.root-servers.net.	90219	IN	A	192.5.5.241
f.root-servers.net.	395095	IN	AAAA	2001:500:2f::f
g.root-servers.net.	90883	IN	A	192.112.36.4
h.root-servers.net.	47921	IN	A	128.63.2.53
h.root-servers.net.	47921	IN	AAAA	2001:500:1::803f:235
i.root-servers.net.	89455	IN	A	192.36.148.17
i.root-servers.net.	89455	IN	AAAA	2001:7fe::53

;; Query time: 9 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Tue May 22 13:10:56 2012
;; MSG SIZE  rcvd: 512

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1853
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 6, ADDITIONAL: 8

;; QUESTION SECTION:
;tunet.edu.cn.			IN	SOA

;; AUTHORITY SECTION:
cn.			172800	IN	NS	a.dns.cn.
cn.			172800	IN	NS	b.dns.cn.
cn.			172800	IN	NS	c.dns.cn.
cn.			172800	IN	NS	d.dns.cn.
cn.			172800	IN	NS	e.dns.cn.
cn.			172800	IN	NS	ns.cernet.net.

;; ADDITIONAL SECTION:
a.dns.cn.		172800	IN	A	203.119.25.1
b.dns.cn.		172800	IN	A	203.119.26.1
c.dns.cn.		172800	IN	A	203.119.27.1
d.dns.cn.		172800	IN	A	203.119.28.1
e.dns.cn.		172800	IN	A	203.119.29.1
ns.cernet.net.		172800	IN	A	202.112.0.44
a.dns.cn.		172800	IN	AAAA	2001:dc7::1
d.dns.cn.		172800	IN	AAAA	2001:dc7:1000::1

;; Query time: 248 msec
;; SERVER: 2001:500:1::803f:235#53(h.root-servers.net)
;; WHEN: Tue May 22 13:10:56 2012
;; MSG SIZE  rcvd: 295

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1327
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 5, ADDITIONAL: 2

;; QUESTION SECTION:
;tunet.edu.cn.			IN	SOA

;; AUTHORITY SECTION:
edu.cn.			172800	IN	NS	ns2.cuhk.hk.
edu.cn.			172800	IN	NS	ns2.cernet.net.
edu.cn.			172800	IN	NS	dns2.edu.cn.
edu.cn.			172800	IN	NS	deneb.dfn.de.
edu.cn.			172800	IN	NS	dns.edu.cn.

;; ADDITIONAL SECTION:
dns.edu.cn.		172800	IN	A	202.112.0.35
dns2.edu.cn.		172800	IN	A	202.112.0.13

;; Query time: 112 msec
;; SERVER: 203.119.26.1#53(b.dns.cn)
;; WHEN: Tue May 22 13:10:57 2012
;; MSG SIZE  rcvd: 178

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1076
;; flags: qr aa; QUERY: 1, ANSWER: 1, AUTHORITY: 3, ADDITIONAL: 3

;; QUESTION SECTION:
;tunet.edu.cn.			IN	SOA

;; ANSWER SECTION:
tunet.edu.cn.		86400	IN	SOA	dns2.edu.cn. szhu.net.tunet.edu.cn. 2005122307 28800 7200 604800 86400

;; AUTHORITY SECTION:
tunet.edu.cn.		86400	IN	NS	dns.tsinghua.edu.cn.
tunet.edu.cn.		86400	IN	NS	dns2.tsinghua.edu.cn.
tunet.edu.cn.		86400	IN	NS	dns2.edu.cn.

;; ADDITIONAL SECTION:
dns2.edu.cn.		172800	IN	A	202.112.0.13
dns.tsinghua.edu.cn.	172800	IN	A	166.111.8.30
dns2.tsinghua.edu.cn.	172800	IN	A	166.111.8.31

;; Query time: 159 msec
;; SERVER: 202.112.0.13#53(dns2.edu.cn)
;; WHEN: Tue May 22 13:10:58 2012
;; MSG SIZE  rcvd: 188

HTTP

Looking for CNAME of www.tunet.edu.cn
Checking if there is a AAAA for www.tunet.edu.cn ... success.
Sending...

HEAD / HTTP/1.1
Host: www.tunet.edu.cn
User-Agent: ipv6-survey.pl/1.97 http://www.mrp.net/IPv6_Survey.html

Reading ...

HTTP/1.1 200 OK
Date: Tue, 22 May 2012 03:41:13 GMT
Server: Apache/2.0.47 (Fedora)
X-Powered-By: PHP/4.3.3
Connection: close
Content-Type: text/html; charset=GB2312

Accessed / [2001:da8:200:101:0:0:0:150] Response: HTTP/1.1 200 OK

SMTP

MX 0 mails.tunet.edu.cn
Looking for AAAA on mails.tunet.edu.cn

DNS

Looking for AAAA of NS dns2.tsinghua.edu.cn
No AAAA record for dns2.tsinghua.edu.cn
Looking for AAAA of NS dns.tsinghua.edu.cn
No AAAA record for dns.tsinghua.edu.cn
Looking for AAAA of NS dns2.edu.cn
No AAAA record for dns2.edu.cn

NTP

Looking for an A record for ntp.tunet.edu.cn
Looking for an A record for clock.tunet.edu.cn
Looking for an A record for time.tunet.edu.cn
Looking for an A record for chime.tunet.edu.cn

XMPP

Looking for a SRV record for _xmpp-client._tcp.tunet.edu.cn
Looking for a SRV record for _xmpp-server._tcp.tunet.edu.cn

Last Updated: Tue May 22 03:41:00 2012 UTC