bind-users Digest, Vol 2427, Issue 1

[Mukund Sivaraman]

On Mon, Jul 04, 2016 at 05:18:27PM +0530, Amit Kumar Gupta wrote:
> Dear All,
> Please find the desired o/ps.
> 
> bash-3.2# dig dropbox.com @203.94.243.70
> 
> ; <<>> DiG 9.6-ESV-R4-P2 <<>> dropbox.com @203.94.243.70
> ;; global options: +cmd
> ;; connection timed out; no servers could be reached
> bash-3.2#

Your client (the machine you are running dig on) probably does not have
a route to 203.94.243.70. Maybe something on the path is filtering
packets.

> bash-3.2# dig +trace dropbox.com  
> 
> ; <<>> DiG 9.6-ESV-R4-P2 <<>> +trace dropbox.com
> ;; global options: +cmd
> .                       495997  IN      NS      b.root-servers.net.
> .                       495997  IN      NS      e.root-servers.net.
> .                       495997  IN      NS      a.root-servers.net.
> .                       495997  IN      NS      i.root-servers.net.
> .                       495997  IN      NS      j.root-servers.net.
> .                       495997  IN      NS      m.root-servers.net.
> .                       495997  IN      NS      l.root-servers.net.
> .                       495997  IN      NS      k.root-servers.net.
> .                       495997  IN      NS      c.root-servers.net.
> .                       495997  IN      NS      h.root-servers.net.
> .                       495997  IN      NS      d.root-servers.net.
> .                       495997  IN      NS      g.root-servers.net.
> .                       495997  IN      NS      f.root-servers.net.
> .                       496015  IN      RRSIG   NS 8 0 518400 20160714050000
> 20160704040000 46551 .
> Gjt4qXWy+cQjMelzL3gB+H6uUsg8RTjo11j4Qa8AMlxKGwziBsTUAhm+
> b9kgxwMTUUozV9Q2OS5La2V6ISyXDITTOGEQ1fKH7hwgboWJKSXmKD7Z
> WNKv2CipQm3kktswMfRXC4Q8XQPtkvSwiR8/OyGk1OCNOY2WdOMgUdcS dM8=
> ;; Received 501 bytes from 203.94.243.70#53(203.94.243.70) in 2 ms
> 
> com.                    172800  IN      NS      j.gtld-servers.net.
> com.                    172800  IN      NS      a.gtld-servers.net.
> com.                    172800  IN      NS      m.gtld-servers.net.
> com.                    172800  IN      NS      c.gtld-servers.net.
> com.                    172800  IN      NS      i.gtld-servers.net.
> com.                    172800  IN      NS      l.gtld-servers.net.
> com.                    172800  IN      NS      b.gtld-servers.net.
> com.                    172800  IN      NS      f.gtld-servers.net.
> com.                    172800  IN      NS      h.gtld-servers.net.
> com.                    172800  IN      NS      e.gtld-servers.net.
> com.                    172800  IN      NS      k.gtld-servers.net.
> com.                    172800  IN      NS      g.gtld-servers.net.
> com.                    172800  IN      NS      d.gtld-servers.net.
> ;; Received 501 bytes from 192.5.5.241#53(f.root-servers.net) in 10851 ms
> 
> dropbox.com.            172800  IN      NS      ns-564.awsdns-06.net.
> dropbox.com.            172800  IN      NS      ns-315.awsdns-39.com.
> dropbox.com.            172800  IN      NS      ns-1162.awsdns-17.org.
> dropbox.com.            172800  IN      NS      ns-1949.awsdns-51.co.uk.
> ;; Received 198 bytes from 192.26.92.30#53(c.gtld-servers.net) in 10002 ms
> 
> dropbox.com.            60      IN      A       108.160.172.206
> dropbox.com.            60      IN      A       108.160.172.238
> dropbox.com.            172800  IN      NS      ns-1162.awsdns-17.org.
> dropbox.com.            172800  IN      NS      ns-1949.awsdns-51.co.uk.
> dropbox.com.            172800  IN      NS      ns-315.awsdns-39.com.
> dropbox.com.            172800  IN      NS      ns-564.awsdns-06.net.
> ;; Received 198 bytes from 205.251.193.59#53(ns-315.awsdns-39.com) in 10002
> ms

On the other hand, the client has routes to the nameservers listed in
this trace and seems to be able to resolve dropbox.com directly.

		Mukund
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