Check that www.gla.ac.uk 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 gla.ac.uk soa
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1726
;; flags: qr ra; QUERY: 1, ANSWER: 13, AUTHORITY: 0, ADDITIONAL: 14

;; QUESTION SECTION:
;.				IN	NS

;; ANSWER SECTION:
.			301645	IN	NS	l.root-servers.net.
.			301645	IN	NS	k.root-servers.net.
.			301645	IN	NS	i.root-servers.net.
.			301645	IN	NS	h.root-servers.net.
.			301645	IN	NS	d.root-servers.net.
.			301645	IN	NS	m.root-servers.net.
.			301645	IN	NS	e.root-servers.net.
.			301645	IN	NS	a.root-servers.net.
.			301645	IN	NS	j.root-servers.net.
.			301645	IN	NS	b.root-servers.net.
.			301645	IN	NS	g.root-servers.net.
.			301645	IN	NS	c.root-servers.net.
.			301645	IN	NS	f.root-servers.net.

;; ADDITIONAL SECTION:
a.root-servers.net.	170968	IN	A	198.41.0.4
a.root-servers.net.	170968	IN	AAAA	2001:503:ba3e::2:30
b.root-servers.net.	129232	IN	A	192.228.79.201
c.root-servers.net.	517016	IN	A	192.33.4.12
d.root-servers.net.	475365	IN	A	128.8.10.90
d.root-servers.net.	475365	IN	AAAA	2001:500:2d::d
e.root-servers.net.	126552	IN	A	192.203.230.10
f.root-servers.net.	171839	IN	A	192.5.5.241
f.root-servers.net.	476715	IN	AAAA	2001:500:2f::f
g.root-servers.net.	172503	IN	A	192.112.36.4
h.root-servers.net.	129541	IN	A	128.63.2.53
h.root-servers.net.	129541	IN	AAAA	2001:500:1::803f:235
i.root-servers.net.	171075	IN	A	192.36.148.17
i.root-servers.net.	171075	IN	AAAA	2001:7fe::53

;; Query time: 7 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Mon May 21 14:30:36 2012
;; MSG SIZE  rcvd: 512

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 366
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 11, ADDITIONAL: 14

;; QUESTION SECTION:
;gla.ac.uk.			IN	SOA

;; AUTHORITY SECTION:
uk.			172800	IN	NS	ns5.nic.uk.
uk.			172800	IN	NS	ns7.nic.uk.
uk.			172800	IN	NS	ns2.nic.uk.
uk.			172800	IN	NS	ns1.nic.uk.
uk.			172800	IN	NS	nsc.nic.uk.
uk.			172800	IN	NS	ns3.nic.uk.
uk.			172800	IN	NS	nsd.nic.uk.
uk.			172800	IN	NS	nsa.nic.uk.
uk.			172800	IN	NS	ns4.nic.uk.
uk.			172800	IN	NS	nsb.nic.uk.
uk.			172800	IN	NS	ns6.nic.uk.

;; ADDITIONAL SECTION:
ns1.nic.uk.		172800	IN	A	195.66.240.130
ns2.nic.uk.		172800	IN	A	217.79.164.131
ns3.nic.uk.		172800	IN	A	213.219.13.131
ns4.nic.uk.		172800	IN	A	194.83.244.131
ns5.nic.uk.		172800	IN	A	213.246.167.131
ns6.nic.uk.		172800	IN	A	213.248.254.130
ns7.nic.uk.		172800	IN	A	212.121.40.130
nsa.nic.uk.		172800	IN	A	156.154.100.3
nsb.nic.uk.		172800	IN	A	156.154.101.3
nsc.nic.uk.		172800	IN	A	156.154.102.3
nsd.nic.uk.		172800	IN	A	156.154.103.3
ns1.nic.uk.		172800	IN	AAAA	2a01:40:1001:35::2
ns4.nic.uk.		172800	IN	AAAA	2001:630:181:35::83
nsa.nic.uk.		172800	IN	AAAA	2001:502:ad09::3

;; Query time: 250 msec
;; SERVER: 2001:500:2d::d#53(d.root-servers.net)
;; WHEN: Mon May 21 14:30:36 2012
;; MSG SIZE  rcvd: 489

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 49
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 7, ADDITIONAL: 0

;; QUESTION SECTION:
;gla.ac.uk.			IN	SOA

;; AUTHORITY SECTION:
ac.uk.			172800	IN	NS	ns4.ja.net.
ac.uk.			172800	IN	NS	ns3.ja.net.
ac.uk.			172800	IN	NS	ns1.surfnet.nl.
ac.uk.			172800	IN	NS	ns0.ja.net.
ac.uk.			172800	IN	NS	ws-fra1.win-ip.dfn.de.
ac.uk.			172800	IN	NS	ns2.ja.net.
ac.uk.			172800	IN	NS	auth03.ns.uu.net.

;; Query time: 316 msec
;; SERVER: 2a01:40:1001:35::2#53(ns1.nic.uk)
;; WHEN: Mon May 21 14:30:37 2012
;; MSG SIZE  rcvd: 195

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 468
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 3, ADDITIONAL: 3

;; QUESTION SECTION:
;gla.ac.uk.			IN	SOA

;; AUTHORITY SECTION:
gla.ac.uk.		86400	IN	NS	dns1.gla.ac.uk.
gla.ac.uk.		86400	IN	NS	dns2.gla.ac.uk.
gla.ac.uk.		86400	IN	NS	dns0.gla.ac.uk.

;; ADDITIONAL SECTION:
dns0.gla.ac.uk.		86400	IN	A	130.209.16.6
dns1.gla.ac.uk.		86400	IN	A	130.209.4.16
dns2.gla.ac.uk.		86400	IN	A	130.209.4.18

;; Query time: 248 msec
;; SERVER: 198.6.1.83#53(auth03.ns.uu.net)
;; WHEN: Mon May 21 14:30:37 2012
;; MSG SIZE  rcvd: 132

;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1330
;; flags: qr aa; QUERY: 1, ANSWER: 1, AUTHORITY: 3, ADDITIONAL: 3

;; QUESTION SECTION:
;gla.ac.uk.			IN	SOA

;; ANSWER SECTION:
gla.ac.uk.		360000	IN	SOA	dns0.gla.ac.uk. hostmaster.gla.ac.uk. 2012051800 3600 3600 3600000 86400

;; AUTHORITY SECTION:
gla.ac.uk.		360000	IN	NS	dns0.gla.ac.uk.
gla.ac.uk.		360000	IN	NS	dns1.gla.ac.uk.
gla.ac.uk.		360000	IN	NS	dns2.gla.ac.uk.

;; ADDITIONAL SECTION:
dns0.gla.ac.uk.		86400	IN	A	130.209.16.6
dns1.gla.ac.uk.		86400	IN	A	130.209.4.16
dns2.gla.ac.uk.		86400	IN	A	130.209.4.18

;; Query time: 322 msec
;; SERVER: 130.209.4.18#53(dns2.gla.ac.uk)
;; WHEN: Mon May 21 14:30:37 2012
;; MSG SIZE  rcvd: 179

HTTP

Looking for CNAME of www.gla.ac.uk
Checking if there is a AAAA for www.gla.ac.uk ... FAILED.


; <<>> DiG 9.4.1-P1 <<>> www.gla.ac.uk aaaa
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 1249
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;www.gla.ac.uk.			IN	AAAA

;; ANSWER SECTION:
www.gla.ac.uk.		86399	IN	CNAME	govan.cent.gla.ac.uk.

;; AUTHORITY SECTION:
gla.ac.uk.		10800	IN	SOA	dns0.gla.ac.uk. hostmaster.gla.ac.uk. 2012051800 3600 3600 3600000 86400

;; Query time: 5 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Mon May 21 14:30:39 2012
;; MSG SIZE  rcvd: 108

Checking other options ... failed too.

SMTP

MX 5 palin.cent.gla.ac.uk
Looking for AAAA on palin.cent.gla.ac.uk
MX 5 cleese.cent.gla.ac.uk
Looking for AAAA on cleese.cent.gla.ac.uk

DNS

Looking for AAAA of NS dns2.gla.ac.uk
No AAAA record for dns2.gla.ac.uk
Looking for AAAA of NS dns1.gla.ac.uk
No AAAA record for dns1.gla.ac.uk
Looking for AAAA of NS dns0.gla.ac.uk
No AAAA record for dns0.gla.ac.uk

NTP

Looking for an A record for ntp.gla.ac.uk
Looking for an A record for clock.gla.ac.uk
Looking for an A record for time.gla.ac.uk
Looking for an A record for chime.gla.ac.uk

XMPP

Looking for a SRV record for _xmpp-client._tcp.gla.ac.uk
Looking for a SRV record for _xmpp-server._tcp.gla.ac.uk

Last Updated: Mon May 21 05:00:44 2012 UTC