Check that www.mit.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 mit.edu soa
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1472
;; flags: qr ra; QUERY: 1, ANSWER: 13, AUTHORITY: 0, ADDITIONAL: 14

;; QUESTION SECTION:
;.				IN	NS

;; ANSWER SECTION:
.			262711	IN	NS	b.root-servers.net.
.			262711	IN	NS	l.root-servers.net.
.			262711	IN	NS	j.root-servers.net.
.			262711	IN	NS	f.root-servers.net.
.			262711	IN	NS	e.root-servers.net.
.			262711	IN	NS	i.root-servers.net.
.			262711	IN	NS	g.root-servers.net.
.			262711	IN	NS	c.root-servers.net.
.			262711	IN	NS	h.root-servers.net.
.			262711	IN	NS	k.root-servers.net.
.			262711	IN	NS	a.root-servers.net.
.			262711	IN	NS	m.root-servers.net.
.			262711	IN	NS	d.root-servers.net.

;; ADDITIONAL SECTION:
a.root-servers.net.	132034	IN	A	198.41.0.4
a.root-servers.net.	132034	IN	AAAA	2001:503:ba3e::2:30
b.root-servers.net.	90298	IN	A	192.228.79.201
c.root-servers.net.	478082	IN	A	192.33.4.12
d.root-servers.net.	436431	IN	A	128.8.10.90
d.root-servers.net.	436431	IN	AAAA	2001:500:2d::d
e.root-servers.net.	87618	IN	A	192.203.230.10
f.root-servers.net.	132905	IN	A	192.5.5.241
f.root-servers.net.	437781	IN	AAAA	2001:500:2f::f
g.root-servers.net.	133569	IN	A	192.112.36.4
h.root-servers.net.	90607	IN	A	128.63.2.53
h.root-servers.net.	90607	IN	AAAA	2001:500:1::803f:235
i.root-servers.net.	132141	IN	A	192.36.148.17
i.root-servers.net.	132141	IN	AAAA	2001:7fe::53

;; Query time: 38 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Tue May 22 01:19:30 2012
;; MSG SIZE  rcvd: 512

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 225
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 6, ADDITIONAL: 7

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

;; AUTHORITY SECTION:
edu.			172800	IN	NS	d.edu-servers.net.
edu.			172800	IN	NS	a.edu-servers.net.
edu.			172800	IN	NS	c.edu-servers.net.
edu.			172800	IN	NS	g.edu-servers.net.
edu.			172800	IN	NS	f.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
g.edu-servers.net.	172800	IN	AAAA	2001:503:cc2c::2:36
l.edu-servers.net.	172800	IN	A	192.41.162.30

;; Query time: 133 msec
;; SERVER: 2001:503:ba3e::2:30#53(a.root-servers.net)
;; WHEN: Tue May 22 01:19:30 2012
;; MSG SIZE  rcvd: 260

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 321
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 3, ADDITIONAL: 3

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

;; AUTHORITY SECTION:
mit.edu.		172800	IN	NS	bitsy.mit.edu.
mit.edu.		172800	IN	NS	strawb.mit.edu.
mit.edu.		172800	IN	NS	w20ns.mit.edu.

;; ADDITIONAL SECTION:
bitsy.mit.edu.		172800	IN	A	18.72.0.3
strawb.mit.edu.		172800	IN	A	18.71.0.151
w20ns.mit.edu.		172800	IN	A	18.70.0.160

;; Query time: 179 msec
;; SERVER: 192.35.51.30#53(f.edu-servers.net)
;; WHEN: Tue May 22 01:19:30 2012
;; MSG SIZE  rcvd: 134

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1805
;; flags: qr aa ra; QUERY: 1, ANSWER: 1, AUTHORITY: 3, ADDITIONAL: 3

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

;; ANSWER SECTION:
mit.edu.		3600	IN	SOA	BITSY.mit.edu. NETWORK-REQUEST.mit.edu. 6824 3600 900 3600000 3600

;; AUTHORITY SECTION:
mit.edu.		3600	IN	NS	W20NS.mit.edu.
mit.edu.		3600	IN	NS	BITSY.mit.edu.
mit.edu.		3600	IN	NS	STRAWB.mit.edu.

;; ADDITIONAL SECTION:
BITSY.mit.edu.		3600	IN	A	18.72.0.3
STRAWB.mit.edu.		3600	IN	A	18.71.0.151
W20NS.mit.edu.		3600	IN	A	18.70.0.160

;; Query time: 264 msec
;; SERVER: 18.70.0.160#53(w20ns.mit.edu)
;; WHEN: Tue May 22 01:19:31 2012
;; MSG SIZE  rcvd: 186

HTTP

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


; <<>> DiG 9.4.1-P1 <<>> www.mit.edu aaaa
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 72
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

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

;; AUTHORITY SECTION:
mit.edu.		3599	IN	SOA	BITSY.mit.edu. NETWORK-REQUEST.mit.edu. 6824 3600 900 3600000 3600

;; Query time: 5 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Tue May 22 01:19:33 2012
;; MSG SIZE  rcvd: 87

Checking other options ... succeeded as www.ipv6.mit.edu.
Connection failed: IO::Socket::INET6: connect: Connection refused

Ping to www.ipv6.mit.edu [2001:4830:2446:b5:0:0:0:1]

2001:4830:2446:b5:0:0:0:1 is alive

Traceroute to www.ipv6.mit.edu [2001:4830:2446:b5:0:0:0:1]

 1  2001:44b8:60::1  0.687 ms  0.623 ms  0.437 ms
 2  2001:44b8:8060:18::6  0.757 ms  0.899 ms  0.637 ms
 3  2001:44b8:8060:34::1  0.656 ms  0.763 ms  0.535 ms
 4  2001:44b8:b060:7::2  20.124 ms  20.179 ms  20.046 ms
 5  2001:44b8:b070:1::12  191.499 ms  143.591 ms  207.949 ms
 6  2001:de8:6::3:71:1  20.229 ms  20.271 ms  20.293 ms
 7  2001:4830:fd:640::1  32.928 ms  33.110 ms  33.636 ms
 8  2001:4830:fd:643::1  195.687 ms  195.834 ms  195.693 ms
 9  2001:4830:ff:e102::2  260.562 ms  260.653 ms  260.033 ms
10  2001:4830:ff:e250::1  260.593 ms  260.156 ms  260.091 ms
11  2001:4830:ff:f150::1  269.534 ms  267.191 ms  267.891 ms
12  2001:4830:ff:b101::2  273.481 ms  273.625 ms  276.663 ms
13  2001:4830:ff:b100::2  273.268 ms  273.304 ms  273.012 ms
14  2001:4830:2446:b5::1  297.495 ms  292.228 ms  292.068 ms

SMTP

MX 100 dmz-mailsec-scanner-1.mit.edu
Looking for AAAA on DMZ-MAILSEC-SCANNER-1.mit.edu
MX 100 dmz-mailsec-scanner-2.mit.edu
Looking for AAAA on DMZ-MAILSEC-SCANNER-2.mit.edu
MX 100 dmz-mailsec-scanner-3.mit.edu
Looking for AAAA on DMZ-MAILSEC-SCANNER-3.mit.edu
MX 100 dmz-mailsec-scanner-4.mit.edu
Looking for AAAA on DMZ-MAILSEC-SCANNER-4.mit.edu
MX 100 dmz-mailsec-scanner-5.mit.edu
Looking for AAAA on DMZ-MAILSEC-SCANNER-5.mit.edu
MX 100 dmz-mailsec-scanner-6.mit.edu
Looking for AAAA on DMZ-MAILSEC-SCANNER-6.mit.edu
MX 100 dmz-mailsec-scanner-7.mit.edu
Looking for AAAA on DMZ-MAILSEC-SCANNER-7.mit.edu
MX 100 dmz-mailsec-scanner-8.mit.edu
Looking for AAAA on DMZ-MAILSEC-SCANNER-8.mit.edu

DNS

Looking for AAAA of NS W20NS.mit.edu
No AAAA record for W20NS.mit.edu
Looking for AAAA of NS STRAWB.mit.edu
No AAAA record for STRAWB.mit.edu
Looking for AAAA of NS BITSY.mit.edu
No AAAA record for BITSY.mit.edu

NTP

Looking for an A record for ntp.mit.edu
Looking for an A record for clock.mit.edu
Looking for an A record for time.mit.edu
Found an A or AAAA record. Now looking for a AAAA.
Cannot find a AAAA record for time.mit.edu
Cannot find a AAAA record for time.ipv6.mit.edu

XMPP

Looking for a SRV record for _xmpp-client._tcp.mit.edu
Found XMPP client JABBER.MIT.EDU (5, 5222)
Trying to connect to 18.9.21.14 on 5222 ... Connection succeeded
Looking for a SRV record for _xmpp-server._tcp.mit.edu
Found XMPP server JABBER.MIT.EDU (5, 5269)
Trying to connect to 18.9.21.14 on 5269 ... Connection succeeded

Last Updated: Mon May 21 15:49:49 2012 UTC