[dnsdist] greqp - how to read?

[bert hubert]

On Thu, Jul 14, 2016 at 10:36:57AM +0200, Bit World Computing - Michael Mertel wrote:
> Hi,
> 
> a vendor is complaining about our dnsdist powered resolver. For that reason I tried to figure out if there are any resolving issues.
> 
> If I grep for the query in question I’am getting this (shortened) output. Does ist mean it only got once forwarded to 8.8.4.4 and what about the other queries? How can I tell if the query got answered or not? Does ist get answered from the cache and how can I tell?
> 
> 
> -42.1   192.168.44.3:59399                                           21448 kas-av-updates.mailfrontier.net. A               RD    Question

If you see only this, I think it did not get forwarded.

Can you share your dnsdist.conf?

Have you checked the built-in webserver? It might give you hints.

Can you show dumpStats()?

Thanks!

Note that 8.8.4.4 might be rate limiting you, it does that..

	Bert

> -41.5   192.168.44.3:40450                                           45885 kas-av-updates.mailfrontier.net. A               RD    Question
> -41.0   192.168.44.3:35357                                           28157 kas-av-updates.mailfrontier.net. A               RD    Question
> -40.2   192.168.44.3:37069                                           56087 kas-av-updates.mailfrontier.net. A               RD    Question
> -39.7   192.168.44.3:46550                                           18199 kas-av-updates.mailfrontier.net. A               RD    Question
> -38.9   192.168.44.3:43979                                           28665 kas-av-updates.mailfrontier.net. A               RD    Question
> -38.0   192.168.44.3:40127                                           49118 kas-av-updates.mailfrontier.net. A               RD    Question
> -38.0   192.168.44.3:40127                              8.8.4.4:53   49118 kas-av-updates.mailfrontier.net. A     25.1      RD    No Error. 2 answers
> -37.6   192.168.44.3:54373                                           15793 kas-av-updates.mailfrontier.net. A               RD    Question
> -36.8   192.168.44.3:50603                                           20839 kas-av-updates.mailfrontier.net. A               RD    Question
> -35.8   192.168.44.3:59500                                           35732 kas-av-updates.mailfrontier.net. A               RD    Question
> -35.1   192.168.44.3:58254                                           9095  kas-av-updates.mailfrontier.net. A               RD    Question
> -34.3   192.168.44.3:51857                                           43880 kas-av-updates.mailfrontier.net. A               RD    Question
> -33.8   192.168.44.3:44658                                           52531 kas-av-updates.mailfrontier.net. A               RD    Question
> -33.4   192.168.44.3:52281                                           9542  kas-av-updates.mailfrontier.net. A               RD    Question
> -32.9   192.168.44.3:59384                                           46892 kas-av-updates.mailfrontier.net. A               RD    Question
> 
> 
> The machine with the dnsdist installed resolves kas-av-updates.mailfrontier.net just fine.
> 
> I wasn’t able to find any RCODE=2 or RCODE=3 responses for that specific dns name.
> 
> Help highly appreciated.
> 
> —Michael



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