Check that www.snu.ac.kr 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 snu.ac.kr soa
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 166
;; flags: qr ra; QUERY: 1, ANSWER: 13, AUTHORITY: 0, ADDITIONAL: 14

;; QUESTION SECTION:
;.				IN	NS

;; ANSWER SECTION:
.			220231	IN	NS	k.root-servers.net.
.			220231	IN	NS	l.root-servers.net.
.			220231	IN	NS	g.root-servers.net.
.			220231	IN	NS	j.root-servers.net.
.			220231	IN	NS	m.root-servers.net.
.			220231	IN	NS	e.root-servers.net.
.			220231	IN	NS	a.root-servers.net.
.			220231	IN	NS	c.root-servers.net.
.			220231	IN	NS	f.root-servers.net.
.			220231	IN	NS	h.root-servers.net.
.			220231	IN	NS	i.root-servers.net.
.			220231	IN	NS	b.root-servers.net.
.			220231	IN	NS	d.root-servers.net.

;; ADDITIONAL SECTION:
a.root-servers.net.	89554	IN	A	198.41.0.4
a.root-servers.net.	89554	IN	AAAA	2001:503:ba3e::2:30
b.root-servers.net.	47818	IN	A	192.228.79.201
c.root-servers.net.	435602	IN	A	192.33.4.12
d.root-servers.net.	393951	IN	A	128.8.10.90
d.root-servers.net.	393951	IN	AAAA	2001:500:2d::d
e.root-servers.net.	45138	IN	A	192.203.230.10
f.root-servers.net.	90425	IN	A	192.5.5.241
f.root-servers.net.	395301	IN	AAAA	2001:500:2f::f
g.root-servers.net.	91089	IN	A	192.112.36.4
h.root-servers.net.	48127	IN	A	128.63.2.53
h.root-servers.net.	48127	IN	AAAA	2001:500:1::803f:235
i.root-servers.net.	89661	IN	A	192.36.148.17
i.root-servers.net.	89661	IN	AAAA	2001:7fe::53

;; Query time: 7 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Tue May 22 13:07:30 2012
;; MSG SIZE  rcvd: 512

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1293
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 6, ADDITIONAL: 8

;; QUESTION SECTION:
;snu.ac.kr.			IN	SOA

;; AUTHORITY SECTION:
kr.			172800	IN	NS	b.dns.kr.
kr.			172800	IN	NS	c.dns.kr.
kr.			172800	IN	NS	d.dns.kr.
kr.			172800	IN	NS	e.dns.kr.
kr.			172800	IN	NS	f.dns.kr.
kr.			172800	IN	NS	g.dns.kr.

;; ADDITIONAL SECTION:
b.dns.kr.		172800	IN	A	61.74.75.1
c.dns.kr.		172800	IN	A	203.248.246.220
d.dns.kr.		172800	IN	A	203.83.159.1
e.dns.kr.		172800	IN	A	202.30.124.100
e.dns.kr.		172800	IN	AAAA	2001:dcc:5::100
f.dns.kr.		172800	IN	A	218.38.181.90
g.dns.kr.		172800	IN	A	202.31.190.1
g.dns.kr.		172800	IN	AAAA	2001:dc5:a::1

;; Query time: 133 msec
;; SERVER: 2001:503:ba3e::2:30#53(a.root-servers.net)
;; WHEN: Tue May 22 13:07:30 2012
;; MSG SIZE  rcvd: 279

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1319
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 2, ADDITIONAL: 2

;; QUESTION SECTION:
;snu.ac.kr.			IN	SOA

;; AUTHORITY SECTION:
snu.ac.kr.		86400	IN	NS	hektor.snu.ac.kr.
snu.ac.kr.		86400	IN	NS	ercc.snu.ac.kr.

;; ADDITIONAL SECTION:
ercc.snu.ac.kr.		86400	IN	A	147.46.80.1
hektor.snu.ac.kr.	86400	IN	A	147.46.37.10

;; Query time: 394 msec
;; SERVER: 2001:dcc:5::100#53(e.dns.kr)
;; WHEN: Tue May 22 13:07:31 2012
;; MSG SIZE  rcvd: 99

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 592
;; flags: qr aa ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;snu.ac.kr.			IN	SOA

;; ANSWER SECTION:
snu.ac.kr.		7200	IN	SOA	ercc.snu.ac.kr. ercc_net.snu.ac.kr. 2012052167 7200 3600 2592000 900

;; Query time: 157 msec
;; SERVER: 147.46.37.10#53(hektor.snu.ac.kr)
;; WHEN: Tue May 22 13:07:32 2012
;; MSG SIZE  rcvd: 77

HTTP

Looking for CNAME of www.snu.ac.kr
Checking if there is a AAAA for www.snu.ac.kr ... FAILED.


; <<>> DiG 9.4.1-P1 <<>> www.snu.ac.kr aaaa
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1608
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;www.snu.ac.kr.			IN	AAAA

;; ANSWER SECTION:
www.snu.ac.kr.		3600	IN	CNAME	kaku2.snu.ac.kr.

;; AUTHORITY SECTION:
snu.ac.kr.		900	IN	SOA	ercc.snu.ac.kr. ercc_net.snu.ac.kr. 2012052167 7200 3600 2592000 900

;; Query time: 5 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Tue May 22 13:07:32 2012
;; MSG SIZE  rcvd: 101

Checking other options ... failed too.

SMTP

MX 5 smtp.snu.ac.kr
Looking for AAAA on smtp.snu.ac.kr

DNS

Looking for AAAA of NS hektor.snu.ac.kr
No AAAA record for hektor.snu.ac.kr
Looking for AAAA of NS ercc.snu.ac.kr
No AAAA record for ercc.snu.ac.kr

NTP

Looking for an A record for ntp.snu.ac.kr
Looking for an A record for clock.snu.ac.kr
Looking for an A record for time.snu.ac.kr
Looking for an A record for chime.snu.ac.kr

XMPP

Looking for a SRV record for _xmpp-client._tcp.snu.ac.kr
Looking for a SRV record for _xmpp-server._tcp.snu.ac.kr

Last Updated: Tue May 22 03:37:35 2012 UTC