Check that www.scu.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 scu.edu.cn soa
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 528
;; flags: qr ra; QUERY: 1, ANSWER: 13, AUTHORITY: 0, ADDITIONAL: 14

;; QUESTION SECTION:
;.				IN	NS

;; ANSWER SECTION:
.			220220	IN	NS	a.root-servers.net.
.			220220	IN	NS	d.root-servers.net.
.			220220	IN	NS	i.root-servers.net.
.			220220	IN	NS	l.root-servers.net.
.			220220	IN	NS	m.root-servers.net.
.			220220	IN	NS	f.root-servers.net.
.			220220	IN	NS	k.root-servers.net.
.			220220	IN	NS	c.root-servers.net.
.			220220	IN	NS	j.root-servers.net.
.			220220	IN	NS	g.root-servers.net.
.			220220	IN	NS	b.root-servers.net.
.			220220	IN	NS	e.root-servers.net.
.			220220	IN	NS	h.root-servers.net.

;; ADDITIONAL SECTION:
a.root-servers.net.	89543	IN	A	198.41.0.4
a.root-servers.net.	89543	IN	AAAA	2001:503:ba3e::2:30
b.root-servers.net.	47807	IN	A	192.228.79.201
c.root-servers.net.	435591	IN	A	192.33.4.12
d.root-servers.net.	393940	IN	A	128.8.10.90
d.root-servers.net.	393940	IN	AAAA	2001:500:2d::d
e.root-servers.net.	45127	IN	A	192.203.230.10
f.root-servers.net.	90414	IN	A	192.5.5.241
f.root-servers.net.	395290	IN	AAAA	2001:500:2f::f
g.root-servers.net.	91078	IN	A	192.112.36.4
h.root-servers.net.	48116	IN	A	128.63.2.53
h.root-servers.net.	48116	IN	AAAA	2001:500:1::803f:235
i.root-servers.net.	89650	IN	A	192.36.148.17
i.root-servers.net.	89650	IN	AAAA	2001:7fe::53

;; Query time: 22 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Tue May 22 13:07:41 2012
;; MSG SIZE  rcvd: 512

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 48
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 6, ADDITIONAL: 8

;; QUESTION SECTION:
;scu.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: 23 msec
;; SERVER: 192.203.230.10#53(e.root-servers.net)
;; WHEN: Tue May 22 13:07:41 2012
;; MSG SIZE  rcvd: 293

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1553
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 5, ADDITIONAL: 2

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

;; AUTHORITY SECTION:
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.
edu.cn.			172800	IN	NS	ns2.cuhk.hk.

;; 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: 203.119.27.1#53(c.dns.cn)
;; WHEN: Tue May 22 13:07:41 2012
;; MSG SIZE  rcvd: 176

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1296
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 2, ADDITIONAL: 2

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

;; AUTHORITY SECTION:
scu.edu.cn.		172800	IN	NS	SECDNS.scu.edu.cn.
scu.edu.cn.		172800	IN	NS	DART.scu.edu.cn.

;; ADDITIONAL SECTION:
DART.scu.edu.cn.	172800	IN	A	202.115.32.39
SECDNS.scu.edu.cn.	172800	IN	A	202.115.32.36

;; Query time: 192 msec
;; SERVER: 2001:250:c006::8#53(ns2.cernet.net)
;; WHEN: Tue May 22 13:07:41 2012
;; MSG SIZE  rcvd: 100

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1728
;; flags: qr aa ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2

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

;; ANSWER SECTION:
scu.edu.cn.		3600	IN	SOA	dart.scu.edu.cn. zengxm.scu.edu.cn. 2012050300 7200 1800 604800 86400

;; AUTHORITY SECTION:
scu.edu.cn.		3600	IN	NS	dart.scu.edu.cn.
scu.edu.cn.		3600	IN	NS	secdns.scu.edu.cn.

;; ADDITIONAL SECTION:
dart.scu.edu.cn.	3600	IN	A	202.115.32.39
secdns.scu.edu.cn.	3600	IN	A	202.115.32.36

;; Query time: 198 msec
;; SERVER: 202.115.32.36#53(SECDNS.scu.edu.cn)
;; WHEN: Tue May 22 13:07:42 2012
;; MSG SIZE  rcvd: 143

HTTP

Looking for CNAME of www.scu.edu.cn
Checking if there is a AAAA for www.scu.edu.cn ... FAILED.


; <<>> DiG 9.4.1-P1 <<>> www.scu.edu.cn aaaa
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 974
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;www.scu.edu.cn.			IN	AAAA

;; AUTHORITY SECTION:
scu.edu.cn.		3600	IN	SOA	dart.scu.edu.cn. zengxm.scu.edu.cn. 2012050300 7200 1800 604800 86400

;; Query time: 26 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Tue May 22 13:07:44 2012
;; MSG SIZE  rcvd: 80

Checking other options ... failed too.

SMTP

MX 5 gw.scu.edu.cn
Looking for AAAA on gw.scu.edu.cn

DNS

Looking for AAAA of NS SECDNS.scu.edu.cn
No AAAA record for SECDNS.scu.edu.cn
Looking for AAAA of NS dart.scu.edu.cn
No AAAA record for dart.scu.edu.cn

NTP

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

XMPP

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

Last Updated: Tue May 22 03:39:07 2012 UTC