[Pdns-users] Problems with ANY query

Hugo van der Kooij hvdkooij at vanderkooij.org
Wed Jul 16 17:49:16 UTC 2008

Hash: SHA1

Martijn Grendelman wrote:

| I have a problem with some PowerDNS servers, running 2.9.20 with gmysql
| backend, in particular with ANY queries. I get good results for some
| domains but not for others, and I have no idea why.

You are aware of the size limit on UDP replies to DNS queries?

Can you repeat the experiments but with a packet capture active? I think
that if you look into the issue with said limitation you will see that
the response is to big and you are summoned to go from UDP to TCP to
perform the query.

With the packet capture you should be able to tell if this is a client
or server or network problem. There is no substitute for cutting down a
problem by establishing which side is not sticking to the standards by
measuring halfway.


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