stranger domain
Frank Y.F. Luo
luoy at muohio.edu
Wed Mar 22 15:00:29 UTC 2006
I was doing a name checking for some domains, say, kean.edu
My name server could not resolve it
$host kean.edu
;; connection timed out; no servers could be reached
but my ISP's name sever (xxx.xx.xx.xx) can
$host kean.edu xxx.xxx.xxx.xxx
Using domain server:
Name: xxx.xxx.xxx.xx
kean.edu has address 131.125.1.105
However, when I turned on trace, it stops at the one point ( the name server
of kean.edu)
$dig +trace @xxx.xx.xx.xx kean.edu
; <<>> DiG 9.2.4rc6 <<>> +trace @xxx.xxx.xxx.xxx kean.edu
;; global options: printcmd
. 195497 IN NS C.ROOT-SERVERS.NET.
. 195497 IN NS D.ROOT-SERVERS.NET.
. 195497 IN NS E.ROOT-SERVERS.NET.
. 195497 IN NS F.ROOT-SERVERS.NET.
. 195497 IN NS G.ROOT-SERVERS.NET.
. 195497 IN NS H.ROOT-SERVERS.NET.
. 195497 IN NS I.ROOT-SERVERS.NET.
. 195497 IN NS J.ROOT-SERVERS.NET.
. 195497 IN NS K.ROOT-SERVERS.NET.
. 195497 IN NS L.ROOT-SERVERS.NET.
. 195497 IN NS M.ROOT-SERVERS.NET.
. 195497 IN NS A.ROOT-SERVERS.NET.
. 195497 IN NS B.ROOT-SERVERS.NET.
;; Received 436 bytes from xxx.xx.xx.xx#53 in 35 ms
edu. 172800 IN NS A3.NSTLD.COM.
edu. 172800 IN NS C3.NSTLD.COM.
edu. 172800 IN NS D3.NSTLD.COM.
edu. 172800 IN NS E3.NSTLD.COM.
edu. 172800 IN NS G3.NSTLD.COM.
edu. 172800 IN NS H3.NSTLD.COM.
edu. 172800 IN NS L3.NSTLD.COM.
edu. 172800 IN NS M3.NSTLD.COM.
;; Received 299 bytes from 192.33.4.12#53(C.ROOT-SERVERS.NET) in 46 ms
kean.edu. 172800 IN NS ASTRO1.kean.edu.
kean.edu. 172800 IN NS ASTRO2.kean.edu.
;; Received 100 bytes from 192.5.6.32#53(A3.NSTLD.COM) in 36 ms
dig: Couldn't find server 'ASTRO1.kean.edu': Name or service not known
Any idea about this strange thing? Thanks in advance.
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