Check that www.nthu.edu.tw 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 nthu.edu.tw soa
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 70
;; flags: qr ra; QUERY: 1, ANSWER: 13, AUTHORITY: 0, ADDITIONAL: 14

;; QUESTION SECTION:
;.				IN	NS

;; ANSWER SECTION:
.			308993	IN	NS	m.root-servers.net.
.			308993	IN	NS	a.root-servers.net.
.			308993	IN	NS	d.root-servers.net.
.			308993	IN	NS	h.root-servers.net.
.			308993	IN	NS	l.root-servers.net.
.			308993	IN	NS	i.root-servers.net.
.			308993	IN	NS	g.root-servers.net.
.			308993	IN	NS	f.root-servers.net.
.			308993	IN	NS	k.root-servers.net.
.			308993	IN	NS	c.root-servers.net.
.			308993	IN	NS	e.root-servers.net.
.			308993	IN	NS	b.root-servers.net.
.			308993	IN	NS	j.root-servers.net.

;; ADDITIONAL SECTION:
a.root-servers.net.	178316	IN	A	198.41.0.4
a.root-servers.net.	178316	IN	AAAA	2001:503:ba3e::2:30
b.root-servers.net.	136580	IN	A	192.228.79.201
c.root-servers.net.	524364	IN	A	192.33.4.12
d.root-servers.net.	482713	IN	A	128.8.10.90
d.root-servers.net.	482713	IN	AAAA	2001:500:2d::d
e.root-servers.net.	133900	IN	A	192.203.230.10
f.root-servers.net.	179187	IN	A	192.5.5.241
f.root-servers.net.	484063	IN	AAAA	2001:500:2f::f
g.root-servers.net.	179851	IN	A	192.112.36.4
h.root-servers.net.	136889	IN	A	128.63.2.53
h.root-servers.net.	136889	IN	AAAA	2001:500:1::803f:235
i.root-servers.net.	178423	IN	A	192.36.148.17
i.root-servers.net.	178423	IN	AAAA	2001:7fe::53

;; Query time: 7 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Mon May 21 12:28:08 2012
;; MSG SIZE  rcvd: 512

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1008
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 10, ADDITIONAL: 15

;; QUESTION SECTION:
;nthu.edu.tw.			IN	SOA

;; AUTHORITY SECTION:
tw.			172800	IN	NS	f.dns.tw.
tw.			172800	IN	NS	c.dns.tw.
tw.			172800	IN	NS	a.dns.tw.
tw.			172800	IN	NS	d.dns.tw.
tw.			172800	IN	NS	sec4.apnic.net.
tw.			172800	IN	NS	g.dns.tw.
tw.			172800	IN	NS	e.dns.tw.
tw.			172800	IN	NS	b.dns.tw.
tw.			172800	IN	NS	h.dns.tw.
tw.			172800	IN	NS	ns.twnic.net.

;; ADDITIONAL SECTION:
a.dns.tw.		172800	IN	A	203.73.24.8
a.dns.tw.		172800	IN	AAAA	2001:cd8:800::8
b.dns.tw.		172800	IN	A	210.201.138.58
b.dns.tw.		172800	IN	AAAA	2404:0:10a0::58
c.dns.tw.		172800	IN	A	61.220.48.1
c.dns.tw.		172800	IN	AAAA	2001:b020:0:77::1
d.dns.tw.		172800	IN	A	210.17.9.230
d.dns.tw.		172800	IN	AAAA	2001:c50:ffff:1::230
e.dns.tw.		172800	IN	A	211.79.207.26
f.dns.tw.		172800	IN	A	163.28.1.10
g.dns.tw.		172800	IN	A	220.229.225.195
h.dns.tw.		172800	IN	A	203.119.3.1
ns.twnic.net.		172800	IN	A	192.83.166.11
ns.twnic.net.		172800	IN	AAAA	2001:288:1:1006::11
sec4.apnic.net.		172800	IN	A	202.12.31.141

;; Query time: 202 msec
;; SERVER: 192.33.4.12#53(c.root-servers.net)
;; WHEN: Mon May 21 12:28:09 2012
;; MSG SIZE  rcvd: 512

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 377
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 7, ADDITIONAL: 11

;; QUESTION SECTION:
;nthu.edu.tw.			IN	SOA

;; AUTHORITY SECTION:
edu.tw.			86400	IN	NS	b.twnic.net.tw.
edu.tw.			86400	IN	NS	a.twnic.net.tw.
edu.tw.			86400	IN	NS	d.twnic.net.tw.
edu.tw.			86400	IN	NS	moemoon.edu.tw.
edu.tw.			86400	IN	NS	moevax.edu.tw.
edu.tw.			86400	IN	NS	moestar.edu.tw.
edu.tw.			86400	IN	NS	c.twnic.net.tw.

;; ADDITIONAL SECTION:
a.twnic.net.tw.		86400	IN	A	192.83.166.9
a.twnic.net.tw.		86400	IN	AAAA	2001:288:1:1006:21b:fcff:fe41:6c81
b.twnic.net.tw.		86400	IN	A	203.73.24.203
b.twnic.net.tw.		86400	IN	AAAA	2001:cd8:800::203
c.twnic.net.tw.		86400	IN	A	168.95.192.10
d.twnic.net.tw.		86400	IN	A	210.17.9.229
d.twnic.net.tw.		86400	IN	AAAA	2001:c50:ffff:1::229
moevax.edu.tw.		86400	IN	A	140.111.1.2
moemoon.edu.tw.		86400	IN	A	192.83.166.17
moemoon.edu.tw.		86400	IN	AAAA	2001:288:1:1002::a611
moestar.edu.tw.		86400	IN	A	163.28.6.21

;; Query time: 116 msec
;; SERVER: 2001:dc0:4001:1:0:1836:0:141#53(sec4.apnic.net)
;; WHEN: Mon May 21 12:28:09 2012
;; MSG SIZE  rcvd: 392

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 771
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 4, ADDITIONAL: 6

;; QUESTION SECTION:
;nthu.edu.tw.			IN	SOA

;; AUTHORITY SECTION:
nthu.edu.tw.		300	IN	NS	dns2.nthu.edu.tw.
nthu.edu.tw.		300	IN	NS	dns3.twaren.net.
nthu.edu.tw.		300	IN	NS	dns1.nthu.edu.tw.
nthu.edu.tw.		300	IN	NS	dns3.nthu.edu.tw.

;; ADDITIONAL SECTION:
dns1.nthu.edu.tw.	300	IN	A	140.114.64.10
dns1.nthu.edu.tw.	300	IN	AAAA	2001:288:e001:64::10
dns2.nthu.edu.tw.	300	IN	A	140.114.63.10
dns2.nthu.edu.tw.	300	IN	AAAA	2001:288:e001:63::10
dns3.nthu.edu.tw.	300	IN	A	140.114.63.20
dns3.nthu.edu.tw.	300	IN	AAAA	2001:288:e001:63::20

;; Query time: 164 msec
;; SERVER: 140.111.1.2#53(moevax.edu.tw)
;; WHEN: Mon May 21 12:28:11 2012
;; MSG SIZE  rcvd: 247

;; connection timed out; no servers could be reached

HTTP

Looking for CNAME of www.nthu.edu.tw
Checking if there is a AAAA for www.nthu.edu.tw ... FAILED.


; <<>> DiG 9.4.1-P1 <<>> www.nthu.edu.tw aaaa
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 677
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;www.nthu.edu.tw.		IN	AAAA

;; AUTHORITY SECTION:
nthu.edu.tw.		10800	IN	SOA	nthu.edu.tw. dnsmaster.nthu.edu.tw. 201205211 28800 7200 1209600 86400

;; Query time: 5 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Mon May 21 12:28:35 2012
;; MSG SIZE  rcvd: 79

Checking other options ... failed too.

SMTP

MX 0 antispam.net.nthu.edu.tw
Looking for AAAA on antispam.net.nthu.edu.tw

DNS

Looking for AAAA of NS dns1.nthu.edu.tw
Querying 2001:288:e001:64:0:0:0:10 for SOA of nthu.edu.tw over IPv6 ... FAILED
Looking for AAAA of NS dns3.twaren.net
Querying 2001:e10:5c00:1:0:0:0:47 for SOA of nthu.edu.tw over IPv6 ... FAILED
Looking for AAAA of NS dns2.nthu.edu.tw
Querying 2001:288:e001:63:0:0:0:10 for SOA of nthu.edu.tw over IPv6 ... FAILED
Looking for AAAA of NS dns3.nthu.edu.tw
Querying 2001:288:e001:63:0:0:0:20 for SOA of nthu.edu.tw over IPv6 ... FAILED

NTP

Looking for an A record for ntp.nthu.edu.tw
Looking for an A record for clock.nthu.edu.tw
Looking for an A record for time.nthu.edu.tw
Looking for an A record for chime.nthu.edu.tw

XMPP

Looking for a SRV record for _xmpp-client._tcp.nthu.edu.tw
Looking for a SRV record for _xmpp-server._tcp.nthu.edu.tw

Last Updated: Mon May 21 03:09:39 2012 UTC