Check that www.fudan.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 fudan.edu.cn soa
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1990
;; flags: qr ra; QUERY: 1, ANSWER: 0, AUTHORITY: 13, ADDITIONAL: 14

;; QUESTION SECTION:
;.				IN	NS

;; AUTHORITY SECTION:
.			3600000	IN	NS	A.ROOT-SERVERS.NET.
.			3600000	IN	NS	B.ROOT-SERVERS.NET.
.			3600000	IN	NS	L.ROOT-SERVERS.NET.
.			3600000	IN	NS	I.ROOT-SERVERS.NET.
.			3600000	IN	NS	J.ROOT-SERVERS.NET.
.			3600000	IN	NS	D.ROOT-SERVERS.NET.
.			3600000	IN	NS	G.ROOT-SERVERS.NET.
.			3600000	IN	NS	K.ROOT-SERVERS.NET.
.			3600000	IN	NS	C.ROOT-SERVERS.NET.
.			3600000	IN	NS	M.ROOT-SERVERS.NET.
.			3600000	IN	NS	E.ROOT-SERVERS.NET.
.			3600000	IN	NS	H.ROOT-SERVERS.NET.
.			3600000	IN	NS	F.ROOT-SERVERS.NET.

;; ADDITIONAL SECTION:
A.ROOT-SERVERS.NET.	438170	IN	A	198.41.0.4
A.ROOT-SERVERS.NET.	438170	IN	AAAA	2001:503:ba3e::2:30
B.ROOT-SERVERS.NET.	396434	IN	A	192.228.79.201
C.ROOT-SERVERS.NET.	138828	IN	A	192.33.4.12
D.ROOT-SERVERS.NET.	135382	IN	A	128.8.10.90
D.ROOT-SERVERS.NET.	135382	IN	AAAA	2001:500:2d::d
E.ROOT-SERVERS.NET.	393754	IN	A	192.203.230.10
F.ROOT-SERVERS.NET.	439041	IN	A	192.5.5.241
F.ROOT-SERVERS.NET.	134777	IN	AAAA	2001:500:2f::f
G.ROOT-SERVERS.NET.	439705	IN	A	192.112.36.4
H.ROOT-SERVERS.NET.	396743	IN	A	128.63.2.53
H.ROOT-SERVERS.NET.	396743	IN	AAAA	2001:500:1::803f:235
I.ROOT-SERVERS.NET.	438277	IN	A	192.36.148.17
I.ROOT-SERVERS.NET.	438277	IN	AAAA	2001:7fe::53

;; Query time: 7 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Fri May 18 12:17:14 2012
;; MSG SIZE  rcvd: 512

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1322
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 6, ADDITIONAL: 8

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

;; AUTHORITY SECTION:
cn.			172800	IN	NS	e.dns.cn.
cn.			172800	IN	NS	ns.cernet.net.
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.

;; 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: 180 msec
;; SERVER: 192.228.79.201#53(B.ROOT-SERVERS.NET)
;; WHEN: Fri May 18 12:17:15 2012
;; MSG SIZE  rcvd: 293

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 683
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 5, ADDITIONAL: 2

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

;; AUTHORITY SECTION:
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.
edu.cn.			172800	IN	NS	ns2.cernet.net.

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

;; Query time: 266 msec
;; SERVER: 2001:dc7::1#53(a.dns.cn)
;; WHEN: Fri May 18 12:17:15 2012
;; MSG SIZE  rcvd: 178

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1535
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 2, ADDITIONAL: 1

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

;; AUTHORITY SECTION:
fudan.edu.cn.		172800	IN	NS	NS.fudan.edu.cn.
fudan.edu.cn.		172800	IN	NS	NS.FUDAN.SH.cn.

;; ADDITIONAL SECTION:
NS.fudan.edu.cn.	172800	IN	A	202.120.224.26

;; Query time: 150 msec
;; SERVER: 202.112.0.13#53(dns2.edu.cn)
;; WHEN: Fri May 18 12:17:15 2012
;; MSG SIZE  rcvd: 89

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 648
;; flags: qr aa ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 1

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

;; ANSWER SECTION:
fudan.edu.cn.		36000	IN	SOA	ns.fudan.edu.cn. root.ns.fudan.edu.cn. 2735 18000 14400 3600000 86400

;; AUTHORITY SECTION:
fudan.edu.cn.		36000	IN	NS	ns.fudan.edu.cn.

;; ADDITIONAL SECTION:
ns.fudan.edu.cn.	36000	IN	A	202.120.224.26

;; Query time: 179 msec
;; SERVER: 202.120.224.26#53(NS.fudan.edu.cn)
;; WHEN: Fri May 18 12:17:16 2012
;; MSG SIZE  rcvd: 104

HTTP

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

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

Reading ...

HTTP/1.1 200 OK
Server: nginx
Date: Fri, 18 May 2012 02:29:04 GMT
Content-Type: text/html
Connection: keep-alive
Keep-Alive: timeout=20
X-Powered-By: PHP/5.2.12-pl0-gentoo
Set-Cookie: vitistime=1337308144

Accessed / [2001:da8:8001:2:21e:c9ff:feb5:eace] Response: HTTP/1.1 200 OK

SMTP

MX 1 mailrelay2.fudan.edu.cn
Looking for AAAA on mailrelay2.fudan.edu.cn
MX 1 mailrelay1.fudan.edu.cn
Looking for AAAA on mailrelay1.fudan.edu.cn
MX 1 gateway.fudan.edu.cn
Looking for AAAA on gateway.fudan.edu.cn
MX 1 webmail.fudan.edu.cn
Looking for AAAA on webmail.fudan.edu.cn

DNS

Looking for AAAA of NS NS.fudan.edu.cn
No AAAA record for NS.fudan.edu.cn

NTP

Looking for an A record for ntp.fudan.edu.cn
Found an A or AAAA record. Now looking for a AAAA.
ntpdate -sq ntp.fudan.edu.cn (2001:da8:8001:81:210:5cff:fee3:a184)
server 2001:da8:8001:81:210:5cff:fee3:a184, stratum 0, offset 0.000000, delay 0.00000
Found problem with stratum (0)

XMPP

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

Last Updated: Fri May 18 02:47:23 2012 UTC