Check that www.jucc.edu.hk 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 jucc.edu.hk soa
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 286
;; flags: qr ra; QUERY: 1, ANSWER: 13, AUTHORITY: 0, ADDITIONAL: 14

;; QUESTION SECTION:
;.				IN	NS

;; ANSWER SECTION:
.			325418	IN	NS	m.root-servers.net.
.			325418	IN	NS	a.root-servers.net.
.			325418	IN	NS	k.root-servers.net.
.			325418	IN	NS	g.root-servers.net.
.			325418	IN	NS	c.root-servers.net.
.			325418	IN	NS	e.root-servers.net.
.			325418	IN	NS	h.root-servers.net.
.			325418	IN	NS	j.root-servers.net.
.			325418	IN	NS	f.root-servers.net.
.			325418	IN	NS	i.root-servers.net.
.			325418	IN	NS	d.root-servers.net.
.			325418	IN	NS	b.root-servers.net.
.			325418	IN	NS	l.root-servers.net.

;; ADDITIONAL SECTION:
a.root-servers.net.	194741	IN	A	198.41.0.4
a.root-servers.net.	194741	IN	AAAA	2001:503:ba3e::2:30
b.root-servers.net.	153005	IN	A	192.228.79.201
c.root-servers.net.	540789	IN	A	192.33.4.12
d.root-servers.net.	499138	IN	A	128.8.10.90
d.root-servers.net.	499138	IN	AAAA	2001:500:2d::d
e.root-servers.net.	150325	IN	A	192.203.230.10
f.root-servers.net.	195612	IN	A	192.5.5.241
f.root-servers.net.	500488	IN	AAAA	2001:500:2f::f
g.root-servers.net.	196276	IN	A	192.112.36.4
h.root-servers.net.	153314	IN	A	128.63.2.53
h.root-servers.net.	153314	IN	AAAA	2001:500:1::803f:235
i.root-servers.net.	194848	IN	A	192.36.148.17
i.root-servers.net.	194848	IN	AAAA	2001:7fe::53

;; Query time: 7 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Mon May 21 07:54:23 2012
;; MSG SIZE  rcvd: 512

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1768
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 8, ADDITIONAL: 13

;; QUESTION SECTION:
;jucc.edu.hk.			IN	SOA

;; AUTHORITY SECTION:
hk.			172800	IN	NS	b.dns.tw.
hk.			172800	IN	NS	z.hkirc.net.hk.
hk.			172800	IN	NS	ns1.hkirc.net.hk.
hk.			172800	IN	NS	ns2.cuhk.edu.hk.
hk.			172800	IN	NS	ns2.hkirc.net.hk.
hk.			172800	IN	NS	sec3.apnic.net.
hk.			172800	IN	NS	adns1.berkeley.edu.
hk.			172800	IN	NS	hk-ns.pch.net.

;; ADDITIONAL SECTION:
b.dns.tw.		172800	IN	A	210.201.138.58
z.hkirc.net.hk.		172800	IN	A	194.146.106.70
ns1.hkirc.net.hk.	172800	IN	A	203.119.2.18
ns2.cuhk.edu.hk.	172800	IN	A	137.189.6.21
ns2.hkirc.net.hk.	172800	IN	A	203.119.87.19
sec3.apnic.net.		172800	IN	A	202.12.28.140
adns1.berkeley.edu.	172800	IN	A	128.32.136.3
hk-ns.pch.net.		172800	IN	A	204.61.216.46
b.dns.tw.		172800	IN	AAAA	2404:0:10a0::58
z.hkirc.net.hk.		172800	IN	AAAA	2001:67c:1010:17::53
ns2.cuhk.edu.hk.	172800	IN	AAAA	2405:3000:3:60::21
ns2.hkirc.net.hk.	172800	IN	AAAA	2001:dca:1000::cb77:5713
sec3.apnic.net.		172800	IN	AAAA	2001:dc0:1:0:4777::140

;; Query time: 23 msec
;; SERVER: 192.203.230.10#53(e.root-servers.net)
;; WHEN: Mon May 21 07:54:23 2012
;; MSG SIZE  rcvd: 494

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1557
;; flags: qr aa; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 3

;; QUESTION SECTION:
;jucc.edu.hk.			IN	SOA

;; ANSWER SECTION:
jucc.edu.hk.		86400	IN	SOA	ns1.hku.hk. ccssg.hkusua.hku.hk. 2011052602 28800 7200 604800 86400

;; AUTHORITY SECTION:
jucc.edu.hk.		86400	IN	NS	ns2.cuhk.edu.hk.
jucc.edu.hk.		86400	IN	NS	ns1.hku.hk.

;; ADDITIONAL SECTION:
ns1.hku.hk.		86400	IN	A	147.8.2.3
ns2.cuhk.edu.hk.	172800	IN	A	137.189.6.21
ns2.cuhk.edu.hk.	172800	IN	AAAA	2405:3000:3:60::21

;; Query time: 110 msec
;; SERVER: 2405:3000:3:60::21#53(ns2.cuhk.edu.hk)
;; WHEN: Mon May 21 07:54:23 2012
;; MSG SIZE  rcvd: 183

HTTP

Looking for CNAME of www.jucc.edu.hk
Checking if there is a AAAA for www.jucc.edu.hk ... FAILED.


; <<>> DiG 9.4.1-P1 <<>> www.jucc.edu.hk aaaa
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 748
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;www.jucc.edu.hk.		IN	AAAA

;; AUTHORITY SECTION:
jucc.edu.hk.		10800	IN	SOA	ns1.hku.hk. ccssg.hkusua.hku.hk. 2011052602 28800 7200 604800 86400

;; Query time: 4 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Mon May 21 07:54:23 2012
;; MSG SIZE  rcvd: 90

Checking other options ... failed too.

SMTP

MX 10 mta1.hku.hk
Looking for AAAA on mta1.hku.hk

DNS

Looking for AAAA of NS ns1.hku.hk
No AAAA record for ns1.hku.hk
Looking for AAAA of NS ns2.cuhk.edu.hk
Querying 2405:3000:3:60:0:0:0:21 for SOA of jucc.edu.hk over IPv6 ... successful!

NTP

Looking for an A record for ntp.jucc.edu.hk
Looking for an A record for clock.jucc.edu.hk
Looking for an A record for time.jucc.edu.hk
Looking for an A record for chime.jucc.edu.hk

XMPP

Looking for a SRV record for _xmpp-client._tcp.jucc.edu.hk
Looking for a SRV record for _xmpp-server._tcp.jucc.edu.hk

Last Updated: Sun May 20 22:24:25 2012 UTC