[dns-operations] problem reverse dns resolve

Jeroen Massar jeroen at unfix.org
Fri Jan 13 11:34:34 UTC 2012

On 2012-01-13 12:12 , Michael Monnerie wrote:
> Helo,
> we have 2 DNS servers in 2 different datacenters, running since years 
> without problem. So I think it's not a problem from us, that both our 
> DNS cannot resolve a simple
> # dig -x
> We just get a timeout, but when I try from different internet accesses, 
> I get a resolve:
> 86400 IN   PTR     vcoe-exchange.vcoe.at.
> Can someone show me where to search for the problem?

Use +trace, and you will find it quickly enough that:

dig +trace -x

228.186.212.in-addr.arpa. 86400	IN	NS	chans01.chello.fr.
228.186.212.in-addr.arpa. 86400	IN	NS	chans00.chello.fr.
;; Received 98 bytes from in 417 ms

;; connection timed out; no servers could be reached

There is your answer as those don't answer


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