DIG NS output order
Stephane Bortzmeyer
bortzmeyer at nic.fr
Mon Mar 3 07:55:15 UTC 2008
On Fri, Feb 29, 2008 at 12:18:01PM -0800,
ultradennis at comcast.net <ultradennis at comcast.net> wrote
a message of 9 lines which said:
> u do a dig @ any ww.abc.com
Impossible. Invalid syntax.
> it comes back with 3 name servers can you assume the first NS record
> is where the answer came from.
No.
> If not, is there a option in DIG when do a query to list what server
> it queried to get the authoritative answer?
dig +trace may be what you want. Example:
% dig +trace AAAA www.ietf.org
...
www.ietf.org. 1800 IN AAAA 2001:1890:1112:1::20
ietf.org. 7200 IN NS ns1.ams1.afilias-nst.info.
ietf.org. 7200 IN NS ns1.sea1.afilias-nst.info.
ietf.org. 7200 IN NS ns0.amsl.com.
...
;; Received 231 bytes from 64.170.98.2#53(ns0.amsl.com) in 159 ms
Otherwise, use tcpdump on the wire :-)
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