Check that www.duke.edu 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 duke.edu soa
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1568
;; flags: qr ra; QUERY: 1, ANSWER: 0, AUTHORITY: 13, ADDITIONAL: 14

;; QUESTION SECTION:
;.				IN	NS

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

;; ADDITIONAL SECTION:
A.ROOT-SERVERS.NET.	479473	IN	A	198.41.0.4
A.ROOT-SERVERS.NET.	479473	IN	AAAA	2001:503:ba3e::2:30
B.ROOT-SERVERS.NET.	437737	IN	A	192.228.79.201
C.ROOT-SERVERS.NET.	180131	IN	A	192.33.4.12
D.ROOT-SERVERS.NET.	176685	IN	A	128.8.10.90
D.ROOT-SERVERS.NET.	176685	IN	AAAA	2001:500:2d::d
E.ROOT-SERVERS.NET.	435057	IN	A	192.203.230.10
F.ROOT-SERVERS.NET.	480344	IN	A	192.5.5.241
F.ROOT-SERVERS.NET.	176080	IN	AAAA	2001:500:2f::f
G.ROOT-SERVERS.NET.	481008	IN	A	192.112.36.4
H.ROOT-SERVERS.NET.	438046	IN	A	128.63.2.53
H.ROOT-SERVERS.NET.	438046	IN	AAAA	2001:500:1::803f:235
I.ROOT-SERVERS.NET.	479580	IN	A	192.36.148.17
I.ROOT-SERVERS.NET.	479580	IN	AAAA	2001:7fe::53

;; Query time: 7 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Fri May 18 00:48:51 2012
;; MSG SIZE  rcvd: 512

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1138
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 6, ADDITIONAL: 7

;; QUESTION SECTION:
;duke.edu.			IN	SOA

;; AUTHORITY SECTION:
edu.			172800	IN	NS	a.edu-servers.net.
edu.			172800	IN	NS	c.edu-servers.net.
edu.			172800	IN	NS	d.edu-servers.net.
edu.			172800	IN	NS	f.edu-servers.net.
edu.			172800	IN	NS	g.edu-servers.net.
edu.			172800	IN	NS	l.edu-servers.net.

;; ADDITIONAL SECTION:
a.edu-servers.net.	172800	IN	A	192.5.6.30
c.edu-servers.net.	172800	IN	A	192.26.92.30
d.edu-servers.net.	172800	IN	A	192.31.80.30
f.edu-servers.net.	172800	IN	A	192.35.51.30
g.edu-servers.net.	172800	IN	A	192.42.93.30
l.edu-servers.net.	172800	IN	A	192.41.162.30
g.edu-servers.net.	172800	IN	AAAA	2001:503:cc2c::2:36

;; Query time: 23 msec
;; SERVER: 192.203.230.10#53(E.ROOT-SERVERS.NET)
;; WHEN: Fri May 18 00:48:51 2012
;; MSG SIZE  rcvd: 264

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 310
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 5, ADDITIONAL: 6

;; QUESTION SECTION:
;duke.edu.			IN	SOA

;; AUTHORITY SECTION:
duke.edu.		172800	IN	NS	avallone.stanford.edu.
duke.edu.		172800	IN	NS	authdns1.netcom.duke.edu.
duke.edu.		172800	IN	NS	authdns2.netcom.duke.edu.
duke.edu.		172800	IN	NS	authdns3.netcom.duke.edu.
duke.edu.		172800	IN	NS	authdns4.netcom.duke.edu.

;; ADDITIONAL SECTION:
avallone.stanford.edu.	172800	IN	A	171.64.7.88
avallone.stanford.edu.	172800	IN	AAAA	2607:f6d0:0:9116::ab40:758
authdns1.netcom.duke.edu. 172800 IN	A	152.3.250.57
authdns2.netcom.duke.edu. 172800 IN	A	152.3.250.60
authdns3.netcom.duke.edu. 172800 IN	A	152.3.250.202
authdns4.netcom.duke.edu. 172800 IN	A	152.3.250.18

;; Query time: 237 msec
;; SERVER: 192.31.80.30#53(d.edu-servers.net)
;; WHEN: Fri May 18 00:48:52 2012
;; MSG SIZE  rcvd: 265

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1029
;; flags: qr aa; QUERY: 1, ANSWER: 1, AUTHORITY: 5, ADDITIONAL: 4

;; QUESTION SECTION:
;duke.edu.			IN	SOA

;; ANSWER SECTION:
duke.edu.		21600	IN	SOA	netreg.duke.edu. datacom-hostmaster.duke.edu. 37154 900 450 3600000 21600

;; AUTHORITY SECTION:
duke.edu.		86400	IN	NS	avallone.stanford.edu.
duke.edu.		86400	IN	NS	authdns1.netcom.duke.edu.
duke.edu.		86400	IN	NS	authdns2.netcom.duke.edu.
duke.edu.		86400	IN	NS	authdns3.netcom.duke.edu.
duke.edu.		86400	IN	NS	authdns4.netcom.duke.edu.

;; ADDITIONAL SECTION:
authdns1.netcom.duke.edu. 86400	IN	A	152.3.250.57
authdns2.netcom.duke.edu. 86400	IN	A	152.3.250.60
authdns3.netcom.duke.edu. 86400	IN	A	152.3.250.202
authdns4.netcom.duke.edu. 86400	IN	A	152.3.250.18

;; Query time: 249 msec
;; SERVER: 152.3.250.57#53(authdns1.netcom.duke.edu)
;; WHEN: Fri May 18 00:48:52 2012
;; MSG SIZE  rcvd: 283

HTTP

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


; <<>> DiG 9.4.1-P1 <<>> www.duke.edu aaaa
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1091
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;www.duke.edu.			IN	AAAA

;; ANSWER SECTION:
www.duke.edu.		299	IN	CNAME	www-duke-lb.oit.duke.edu.

;; AUTHORITY SECTION:
oit.duke.edu.		10799	IN	SOA	netreg1.netcom.duke.edu. hostmaster.oit.duke.edu. 716093 7200 600 604800 86400

;; Query time: 5 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Fri May 18 00:48:54 2012
;; MSG SIZE  rcvd: 122

Checking other options ... failed too.

SMTP

MX 10 mx.oit.duke.edu
Looking for AAAA on mx.oit.duke.edu

DNS

Looking for AAAA of NS authdns1.netcom.duke.edu
No AAAA record for authdns1.netcom.duke.edu
Looking for AAAA of NS authdns3.netcom.duke.edu
No AAAA record for authdns3.netcom.duke.edu
Looking for AAAA of NS authdns4.netcom.duke.edu
No AAAA record for authdns4.netcom.duke.edu
Looking for AAAA of NS authdns2.netcom.duke.edu
No AAAA record for authdns2.netcom.duke.edu
Looking for AAAA of NS avallone.stanford.edu
Querying 2607:f6d0:0:9116:0:0:ab40:758 for SOA of duke.edu over IPv6 ... FAILED

NTP

Looking for an A record for ntp.duke.edu
Looking for an A record for clock.duke.edu
Looking for an A record for time.duke.edu
Looking for an A record for chime.duke.edu

XMPP

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

Last Updated: Thu May 17 15:21:29 2012 UTC