problem getting address record for google public dns server
M. Meadows
sun-guru at live.com
Tue Nov 16 21:00:52 UTC 2010
Can someone explain the following dig results? The first dig @8.8.8.8 provides the expected result
: dig +noall +answer google-public-dns-a.google.com @8.8.8.8
google-public-dns-a.google.com. 85040 IN A 8.8.8.8
We get the same result from KLOTH.NET (http://www.kloth.net/services/nslookup.php)
But when we specify the public facing exacttarget.com server
: dig +noall +answer google-public-dns-a.google.com @66.231.91.222
No answer
And when we use +trace ... it seems to find it's way to the correct answer.
: dig google-public-dns-a.google.com @66.231.91.222 +trace
; <<>> DiG 9.3.6-P1-RedHat-9.3.6-4.P1.el5_4.2 <<>> google-public-dns-a.google.com @66.231.91.222 +trace
;; global options: printcmd
. 3600000 IN NS A.ROOT-SERVERS.NET.
. 3600000 IN NS B.ROOT-SERVERS.NET.
. 3600000 IN NS C.ROOT-SERVERS.NET.
. 3600000 IN NS D.ROOT-SERVERS.NET.
. 3600000 IN NS E.ROOT-SERVERS.NET.
. 3600000 IN NS F.ROOT-SERVERS.NET.
. 3600000 IN NS G.ROOT-SERVERS.NET.
. 3600000 IN NS H.ROOT-SERVERS.NET.
. 3600000 IN NS I.ROOT-SERVERS.NET.
. 3600000 IN NS J.ROOT-SERVERS.NET.
. 3600000 IN NS K.ROOT-SERVERS.NET.
. 3600000 IN NS L.ROOT-SERVERS.NET.
. 3600000 IN NS M.ROOT-SERVERS.NET.
;; Received 228 bytes from 66.231.91.222#53(66.231.91.222) in 1 ms
com. 172800 IN NS g.gtld-servers.net.
com. 172800 IN NS f.gtld-servers.net.
com. 172800 IN NS l.gtld-servers.net.
com. 172800 IN NS h.gtld-servers.net.
com. 172800 IN NS j.gtld-servers.net.
com. 172800 IN NS c.gtld-servers.net.
com. 172800 IN NS i.gtld-servers.net.
com. 172800 IN NS d.gtld-servers.net.
com. 172800 IN NS k.gtld-servers.net.
com. 172800 IN NS m.gtld-servers.net.
com. 172800 IN NS a.gtld-servers.net.
com. 172800 IN NS e.gtld-servers.net.
com. 172800 IN NS b.gtld-servers.net.
;; Received 504 bytes from 198.41.0.4#53(A.ROOT-SERVERS.NET) in 35 ms
google.com. 172800 IN NS ns2.google.com.
google.com. 172800 IN NS ns1.google.com.
google.com. 172800 IN NS ns3.google.com.
google.com. 172800 IN NS ns4.google.com.
;; Received 184 bytes from 192.42.93.30#53(g.gtld-servers.net) in 75 ms
google-public-dns-a.google.com. 86400 IN A 8.8.8.8
;; Received 64 bytes from 216.239.34.10#53(ns2.google.com) in 39 ms
What's going on?
Thanks!
Marty
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