Unable to get AAAA for www.revk.uk from some of our servers
Mark Andrews
marka at isc.org
Tue Dec 23 20:52:39 UTC 2014
I would suspect that the instance of the google servers you are talking
to has a bad copy of l.google.com. The serial in the soa records is
1577052. I currently see 1577063.
There is also a possibilty that you are getting spoofed answers by as
the zone is not signed there is no way to know.
Mark
In message <000201d01ec7$47f99ad0$d7ecd070$@iname.com>, "Frank Bulk" writes:
> >From time to time there are certain domains that don't properly resolve on
> our corporate Windows DNS servers, but flushing the Windows DNS server cache
> resolves that. But yesterday I ran into an issue with resolving the AAAA
> for www.revk.uk on just some our ISP DNS servers and I have time to dig into
> it.
>
> They're mostly running BIND 9.7.3 (Debian-patched) or 9.8.4 (Debian
> patched), some of them behind a load-balancer. In each case if the DNS
> server can't resolve the AAAA for www.revk.uk it's also because it can't
> resolve the AAAA for ghs.l.google.com, which is the last CNAME in the chain
> for www.revk.uk.
>
> How do I go about tracking this down? (Sorry, most of the servers have ACLs
> that prevent the public from resolving them, so you won't be able to test
> remotely.)
>
> Regards,
>
> Frank
>
>
> I have a script that checks against the IPv4 and IPv6 of each DNS server
> (identical), both the IPs that are behind the load-balancer and in front.
>
> root at nagios:/tmp# dig-all AAAA www.revk.uk
> ============================================
> DNS server: 10.20.0.10 (server1 behind load-balancer)
>
> ; <<>> DiG 9.7.3 <<>> AAAA www.revk.uk @10.20.0.10
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 46710
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 1, ADDITIONAL: 0
>
> ;; QUESTION SECTION:
> ;www.revk.uk. IN AAAA
>
> ;; ANSWER SECTION:
> www.revk.uk. 3600 IN CNAME ghs.google.com.
> ghs.google.com. 21000 IN CNAME ghs.l.google.com.
>
> ;; AUTHORITY SECTION:
> l.google.com. 469 IN SOA ns4.google.com.
> dns-admin.google.com. 1577052 900 900 1800 60
>
> ;; Query time: 108 msec
> ;; SERVER: 10.20.0.10#53(10.20.0.10)
> ;; WHEN: Tue Dec 23 09:04:25 2014
> ;; MSG SIZE rcvd: 127
>
> ============================================
> DNS server: 2607:fe28:0:4000::10 (server1 behind load-balancer)
>
> ; <<>> DiG 9.7.3 <<>> -6 AAAA www.revk.uk @2607:fe28:0:4000::10
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 43711
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 1, ADDITIONAL: 0
>
> ;; QUESTION SECTION:
> ;www.revk.uk. IN AAAA
>
> ;; ANSWER SECTION:
> www.revk.uk. 3600 IN CNAME ghs.google.com.
> ghs.google.com. 21000 IN CNAME ghs.l.google.com.
>
> ;; AUTHORITY SECTION:
> l.google.com. 469 IN SOA ns4.google.com.
> dns-admin.google.com. 1577052 900 900 1800 60
>
> ;; Query time: 0 msec
> ;; SERVER: 2607:fe28:0:4000::10#53(2607:fe28:0:4000::10)
> ;; WHEN: Tue Dec 23 09:04:25 2014
> ;; MSG SIZE rcvd: 127
>
> ============================================
> DNS server: 10.20.0.20 (server2 behind load-balancer)
>
> ; <<>> DiG 9.7.3 <<>> AAAA www.revk.uk @10.20.0.20
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 37596
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 1, ADDITIONAL: 0
>
> ;; QUESTION SECTION:
> ;www.revk.uk. IN AAAA
>
> ;; ANSWER SECTION:
> www.revk.uk. 3600 IN CNAME ghs.google.com.
> ghs.google.com. 21042 IN CNAME ghs.l.google.com.
>
> ;; AUTHORITY SECTION:
> l.google.com. 437 IN SOA ns3.google.com.
> dns-admin.google.com. 1577052 900 900 1800 60
>
> ;; Query time: 109 msec
> ;; SERVER: 10.20.0.20#53(10.20.0.20)
> ;; WHEN: Tue Dec 23 09:04:25 2014
> ;; MSG SIZE rcvd: 127
>
> ============================================
> DNS server: 2607:fe28:0:4000::20 (server2 behind load-balancer)
>
> ; <<>> DiG 9.7.3 <<>> -6 AAAA www.revk.uk @2607:fe28:0:4000::20
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 20244
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 1, ADDITIONAL: 0
>
> ;; QUESTION SECTION:
> ;www.revk.uk. IN AAAA
>
> ;; ANSWER SECTION:
> www.revk.uk. 3600 IN CNAME ghs.google.com.
> ghs.google.com. 21042 IN CNAME ghs.l.google.com.
>
> ;; AUTHORITY SECTION:
> l.google.com. 437 IN SOA ns3.google.com.
> dns-admin.google.com. 1577052 900 900 1800 60
>
> ;; Query time: 0 msec
> ;; SERVER: 2607:fe28:0:4000::20#53(2607:fe28:0:4000::20)
> ;; WHEN: Tue Dec 23 09:04:25 2014
> ;; MSG SIZE rcvd: 127
>
> ============================================
> DNS server: 10.20.0.100 (server3 behind load-balancer)
>
> ; <<>> DiG 9.7.3 <<>> AAAA www.revk.uk @10.20.0.100
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 60172
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 1, ADDITIONAL: 0
>
> ;; QUESTION SECTION:
> ;www.revk.uk. IN AAAA
>
> ;; ANSWER SECTION:
> www.revk.uk. 3600 IN CNAME ghs.google.com.
> ghs.google.com. 196602 IN CNAME ghs.l.google.com.
>
> ;; AUTHORITY SECTION:
> l.google.com. 469 IN SOA ns4.google.com.
> dns-admin.google.com. 1577052 900 900 1800 60
>
> ;; Query time: 126 msec
> ;; SERVER: 10.20.0.100#53(10.20.0.100)
> ;; WHEN: Tue Dec 23 09:04:25 2014
> ;; MSG SIZE rcvd: 127
>
> ============================================
> DNS server: 2607:fe28:0:4000::100 (server3 behind load-balancer)
>
> ; <<>> DiG 9.7.3 <<>> -6 AAAA www.revk.uk @2607:fe28:0:4000::100
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 37149
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 1, ADDITIONAL: 0
>
> ;; QUESTION SECTION:
> ;www.revk.uk. IN AAAA
>
> ;; ANSWER SECTION:
> www.revk.uk. 3600 IN CNAME ghs.google.com.
> ghs.google.com. 196602 IN CNAME ghs.l.google.com.
>
> ;; AUTHORITY SECTION:
> l.google.com. 469 IN SOA ns4.google.com.
> dns-admin.google.com. 1577052 900 900 1800 60
>
> ;; Query time: 0 msec
> ;; SERVER: 2607:fe28:0:4000::100#53(2607:fe28:0:4000::100)
> ;; WHEN: Tue Dec 23 09:04:25 2014
> ;; MSG SIZE rcvd: 127
>
> ============================================
> DNS server: 10.20.0.200 (server4 behind load-balancer)
>
> ; <<>> DiG 9.7.3 <<>> AAAA www.revk.uk @10.20.0.200
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 31066
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 1, ADDITIONAL: 0
>
> ;; QUESTION SECTION:
> ;www.revk.uk. IN AAAA
>
> ;; ANSWER SECTION:
> www.revk.uk. 3600 IN CNAME ghs.google.com.
> ghs.google.com. 196608 IN CNAME ghs.l.google.com.
>
> ;; AUTHORITY SECTION:
> l.google.com. 328 IN SOA ns4.google.com.
> dns-admin.google.com. 1577051 900 900 1800 60
>
> ;; Query time: 115 msec
> ;; SERVER: 10.20.0.200#53(10.20.0.200)
> ;; WHEN: Tue Dec 23 09:04:25 2014
> ;; MSG SIZE rcvd: 127
>
> ============================================
> DNS server: 2607:fe28:0:4000::200 (server4 behind load-balancer)
>
> ; <<>> DiG 9.7.3 <<>> -6 AAAA www.revk.uk @2607:fe28:0:4000::200
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 7874
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 1, ADDITIONAL: 0
>
> ;; QUESTION SECTION:
> ;www.revk.uk. IN AAAA
>
> ;; ANSWER SECTION:
> www.revk.uk. 3600 IN CNAME ghs.google.com.
> ghs.google.com. 196608 IN CNAME ghs.l.google.com.
>
> ;; AUTHORITY SECTION:
> l.google.com. 328 IN SOA ns4.google.com.
> dns-admin.google.com. 1577051 900 900 1800 60
>
> ;; Query time: 0 msec
> ;; SERVER: 2607:fe28:0:4000::200#53(2607:fe28:0:4000::200)
> ;; WHEN: Tue Dec 23 09:04:25 2014
> ;; MSG SIZE rcvd: 127
>
> ============================================
> DNS server: 96.31.0.32 (load-balancer)
>
> ; <<>> DiG 9.7.3 <<>> AAAA www.revk.uk @96.31.0.32
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 39076
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 1, ADDITIONAL: 0
>
> ;; QUESTION SECTION:
> ;www.revk.uk. IN AAAA
>
> ;; ANSWER SECTION:
> www.revk.uk. 3600 IN CNAME ghs.google.com.
> ghs.google.com. 21042 IN CNAME ghs.l.google.com.
>
> ;; AUTHORITY SECTION:
> l.google.com. 437 IN SOA ns3.google.com.
> dns-admin.google.com. 1577052 900 900 1800 60
>
> ;; Query time: 0 msec
> ;; SERVER: 96.31.0.32#53(96.31.0.32)
> ;; WHEN: Tue Dec 23 09:04:25 2014
> ;; MSG SIZE rcvd: 127
>
> ============================================
> DNS server: 2607:fe28:0:1000::32 (load-balancer)
>
> ; <<>> DiG 9.7.3 <<>> -6 AAAA www.revk.uk @2607:fe28:0:1000::32
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 45784
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 1, ADDITIONAL: 0
>
> ;; QUESTION SECTION:
> ;www.revk.uk. IN AAAA
>
> ;; ANSWER SECTION:
> www.revk.uk. 3600 IN CNAME ghs.google.com.
> ghs.google.com. 196602 IN CNAME ghs.l.google.com.
>
> ;; AUTHORITY SECTION:
> l.google.com. 469 IN SOA ns4.google.com.
> dns-admin.google.com. 1577052 900 900 1800 60
>
> ;; Query time: 0 msec
> ;; SERVER: 2607:fe28:0:1000::32#53(2607:fe28:0:1000::32)
> ;; WHEN: Tue Dec 23 09:04:25 2014
> ;; MSG SIZE rcvd: 127
>
> ============================================
> DNS server: 10.20.0.5 (private IP of server5)
>
> ; <<>> DiG 9.7.3 <<>> AAAA www.revk.uk @10.20.0.5
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 13916
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 4, ADDITIONAL: 4
>
> ;; QUESTION SECTION:
> ;www.revk.uk. IN AAAA
>
> ;; ANSWER SECTION:
> www.revk.uk. 3600 IN CNAME ghs.google.com.
> ghs.google.com. 35425 IN CNAME ghs.l.google.com.
> ghs.l.google.com. 300 IN AAAA 2607:f8b0:4001:c01::79
>
> ;; AUTHORITY SECTION:
> google.com. 108307 IN NS ns1.google.com.
> google.com. 108307 IN NS ns2.google.com.
> google.com. 108307 IN NS ns4.google.com.
> google.com. 108307 IN NS ns3.google.com.
>
> ;; ADDITIONAL SECTION:
> ns1.google.com. 293243 IN A 216.239.32.10
> ns2.google.com. 293243 IN A 216.239.34.10
> ns3.google.com. 293243 IN A 216.239.36.10
> ns4.google.com. 293243 IN A 216.239.38.10
>
> ;; Query time: 313 msec
> ;; SERVER: 10.20.0.5#53(10.20.0.5)
> ;; WHEN: Tue Dec 23 09:04:25 2014
> ;; MSG SIZE rcvd: 241
>
> ============================================
> DNS server: 96.31.0.5 (public IP of server5)
>
> ; <<>> DiG 9.7.3 <<>> AAAA www.revk.uk @96.31.0.5
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 56265
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 4, ADDITIONAL: 4
>
> ;; QUESTION SECTION:
> ;www.revk.uk. IN AAAA
>
> ;; ANSWER SECTION:
> www.revk.uk. 3600 IN CNAME ghs.google.com.
> ghs.google.com. 35425 IN CNAME ghs.l.google.com.
> ghs.l.google.com. 300 IN AAAA 2607:f8b0:4001:c01::79
>
> ;; AUTHORITY SECTION:
> google.com. 108307 IN NS ns2.google.com.
> google.com. 108307 IN NS ns1.google.com.
> google.com. 108307 IN NS ns3.google.com.
> google.com. 108307 IN NS ns4.google.com.
>
> ;; ADDITIONAL SECTION:
> ns1.google.com. 293243 IN A 216.239.32.10
> ns2.google.com. 293243 IN A 216.239.34.10
> ns3.google.com. 293243 IN A 216.239.36.10
> ns4.google.com. 293243 IN A 216.239.38.10
>
> ;; Query time: 0 msec
> ;; SERVER: 96.31.0.5#53(96.31.0.5)
> ;; WHEN: Tue Dec 23 09:04:25 2014
> ;; MSG SIZE rcvd: 241
>
> ============================================
> DNS server: 2607:fe28:0:1000::5 (private IP of server5)
>
> ; <<>> DiG 9.7.3 <<>> -6 AAAA www.revk.uk @2607:fe28:0:1000::5
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 51958
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 4, ADDITIONAL: 4
>
> ;; QUESTION SECTION:
> ;www.revk.uk. IN AAAA
>
> ;; ANSWER SECTION:
> www.revk.uk. 3600 IN CNAME ghs.google.com.
> ghs.google.com. 35425 IN CNAME ghs.l.google.com.
> ghs.l.google.com. 300 IN AAAA 2607:f8b0:4001:c01::79
>
> ;; AUTHORITY SECTION:
> google.com. 108307 IN NS ns3.google.com.
> google.com. 108307 IN NS ns2.google.com.
> google.com. 108307 IN NS ns4.google.com.
> google.com. 108307 IN NS ns1.google.com.
>
> ;; ADDITIONAL SECTION:
> ns1.google.com. 293243 IN A 216.239.32.10
> ns2.google.com. 293243 IN A 216.239.34.10
> ns3.google.com. 293243 IN A 216.239.36.10
> ns4.google.com. 293243 IN A 216.239.38.10
>
> ;; Query time: 0 msec
> ;; SERVER: 2607:fe28:0:1000::5#53(2607:fe28:0:1000::5)
> ;; WHEN: Tue Dec 23 09:04:25 2014
> ;; MSG SIZE rcvd: 241
>
> ============================================
> DNS server: 10.20.0.8 (private IP of server8)
>
> ; <<>> DiG 9.7.3 <<>> AAAA www.revk.uk @10.20.0.8
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 12865
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 4, ADDITIONAL: 4
>
> ;; QUESTION SECTION:
> ;www.revk.uk. IN AAAA
>
> ;; ANSWER SECTION:
> www.revk.uk. 3600 IN CNAME ghs.google.com.
> ghs.google.com. 539906 IN CNAME ghs.l.google.com.
> ghs.l.google.com. 300 IN AAAA 2607:f8b0:4001:c05::79
>
> ;; AUTHORITY SECTION:
> google.com. 107906 IN NS ns3.google.com.
> google.com. 107906 IN NS ns1.google.com.
> google.com. 107906 IN NS ns2.google.com.
> google.com. 107906 IN NS ns4.google.com.
>
> ;; ADDITIONAL SECTION:
> ns1.google.com. 107906 IN A 216.239.32.10
> ns2.google.com. 107906 IN A 216.239.34.10
> ns3.google.com. 107906 IN A 216.239.36.10
> ns4.google.com. 107906 IN A 216.239.38.10
>
> ;; Query time: 161 msec
> ;; SERVER: 10.20.0.8#53(10.20.0.8)
> ;; WHEN: Tue Dec 23 09:04:26 2014
> ;; MSG SIZE rcvd: 241
>
> ============================================
> DNS server: 96.31.0.8 (public IP of server8)
>
> ; <<>> DiG 9.7.3 <<>> AAAA www.revk.uk @96.31.0.8
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 52910
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 4, ADDITIONAL: 4
>
> ;; QUESTION SECTION:
> ;www.revk.uk. IN AAAA
>
> ;; ANSWER SECTION:
> www.revk.uk. 3600 IN CNAME ghs.google.com.
> ghs.google.com. 539906 IN CNAME ghs.l.google.com.
> ghs.l.google.com. 300 IN AAAA 2607:f8b0:4001:c05::79
>
> ;; AUTHORITY SECTION:
> google.com. 107906 IN NS ns2.google.com.
> google.com. 107906 IN NS ns4.google.com.
> google.com. 107906 IN NS ns1.google.com.
> google.com. 107906 IN NS ns3.google.com.
>
> ;; ADDITIONAL SECTION:
> ns1.google.com. 107906 IN A 216.239.32.10
> ns2.google.com. 107906 IN A 216.239.34.10
> ns3.google.com. 107906 IN A 216.239.36.10
> ns4.google.com. 107906 IN A 216.239.38.10
>
> ;; Query time: 0 msec
> ;; SERVER: 96.31.0.8#53(96.31.0.8)
> ;; WHEN: Tue Dec 23 09:04:26 2014
> ;; MSG SIZE rcvd: 241
>
> ============================================
> DNS server: 2607:fe28:0:1000::8 (public IP of server8)
>
> ; <<>> DiG 9.7.3 <<>> -6 AAAA www.revk.uk @2607:fe28:0:1000::8
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 21855
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 4, ADDITIONAL: 4
>
> ;; QUESTION SECTION:
> ;www.revk.uk. IN AAAA
>
> ;; ANSWER SECTION:
> www.revk.uk. 3600 IN CNAME ghs.google.com.
> ghs.google.com. 539906 IN CNAME ghs.l.google.com.
> ghs.l.google.com. 300 IN AAAA 2607:f8b0:4001:c05::79
>
> ;; AUTHORITY SECTION:
> google.com. 107906 IN NS ns3.google.com.
> google.com. 107906 IN NS ns2.google.com.
> google.com. 107906 IN NS ns1.google.com.
> google.com. 107906 IN NS ns4.google.com.
>
> ;; ADDITIONAL SECTION:
> ns1.google.com. 107906 IN A 216.239.32.10
> ns2.google.com. 107906 IN A 216.239.34.10
> ns3.google.com. 107906 IN A 216.239.36.10
> ns4.google.com. 107906 IN A 216.239.38.10
>
> ;; Query time: 0 msec
> ;; SERVER: 2607:fe28:0:1000::8#53(2607:fe28:0:1000::8)
> ;; WHEN: Tue Dec 23 09:04:26 2014
> ;; MSG SIZE rcvd: 241
>
> ============================================
> DNS server: 199.120.69.24 (public IP of other server)
>
> ; <<>> DiG 9.7.3 <<>> AAAA www.revk.uk @199.120.69.24
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 56923
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 4, ADDITIONAL: 4
>
> ;; QUESTION SECTION:
> ;www.revk.uk. IN AAAA
>
> ;; ANSWER SECTION:
> www.revk.uk. 3600 IN CNAME ghs.google.com.
> ghs.google.com. 31030 IN CNAME ghs.l.google.com.
> ghs.l.google.com. 291 IN AAAA 2607:f8b0:4001:c05::79
>
> ;; AUTHORITY SECTION:
> google.com. 108305 IN NS ns3.google.com.
> google.com. 108305 IN NS ns1.google.com.
> google.com. 108305 IN NS ns4.google.com.
> google.com. 108305 IN NS ns2.google.com.
>
> ;; ADDITIONAL SECTION:
> ns1.google.com. 44035 IN A 216.239.32.10
> ns2.google.com. 252620 IN A 216.239.34.10
> ns3.google.com. 259249 IN A 216.239.36.10
> ns4.google.com. 252643 IN A 216.239.38.10
>
> ;; Query time: 116 msec
> ;; SERVER: 199.120.69.24#53(199.120.69.24)
> ;; WHEN: Tue Dec 23 09:04:26 2014
> ;; MSG SIZE rcvd: 241
>
> ============================================
> DNS server: 167.142.225.5 (server1 of upstream provider)
>
> ; <<>> DiG 9.7.3 <<>> AAAA www.revk.uk @167.142.225.5
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 34333
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 4, ADDITIONAL: 4
>
> ;; QUESTION SECTION:
> ;www.revk.uk. IN AAAA
>
> ;; ANSWER SECTION:
> www.revk.uk. 3600 IN CNAME ghs.google.com.
> ghs.google.com. 584796 IN CNAME ghs.l.google.com.
> ghs.l.google.com. 138 IN AAAA 2607:f8b0:4001:c03::79
>
> ;; AUTHORITY SECTION:
> google.com. 152742 IN NS ns4.google.com.
> google.com. 152742 IN NS ns3.google.com.
> google.com. 152742 IN NS ns2.google.com.
> google.com. 152742 IN NS ns1.google.com.
>
> ;; ADDITIONAL SECTION:
> ns1.google.com. 152742 IN A 216.239.32.10
> ns2.google.com. 152742 IN A 216.239.34.10
> ns3.google.com. 152742 IN A 216.239.36.10
> ns4.google.com. 152742 IN A 216.239.38.10
>
> ;; Query time: 111 msec
> ;; SERVER: 167.142.225.5#53(167.142.225.5)
> ;; WHEN: Tue Dec 23 09:04:26 2014
> ;; MSG SIZE rcvd: 241
>
> ============================================
> DNS server: 167.142.225.6 (server2 of upstream provider)
>
> ; <<>> DiG 9.7.3 <<>> AAAA www.revk.uk @167.142.225.6
> ;; global options: +cmd
> ;; Got answer:
> ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 32897
> ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 1, ADDITIONAL: 0
>
> ;; QUESTION SECTION:
> ;www.revk.uk. IN AAAA
>
> ;; ANSWER SECTION:
> www.revk.uk. 3600 IN CNAME ghs.google.com.
> ghs.google.com. 586626 IN CNAME ghs.l.google.com.
>
> ;; AUTHORITY SECTION:
> l.google.com. 547 IN SOA ns3.google.com.
> dns-admin.google.com. 1577052 900 900 1800 60
>
> ;; Query time: 113 msec
> ;; SERVER: 167.142.225.6#53(167.142.225.6)
> ;; WHEN: Tue Dec 23 09:04:26 2014
> ;; MSG SIZE rcvd: 127
>
> ============================================
>
> _______________________________________________
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>
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--
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742 INTERNET: marka at isc.org
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