[Pdns-users] MSG SIZE exceeds 512 bytes

Hauke Lampe lampe at hauke-lampe.de
Wed Dec 5 11:47:25 UTC 2012

On 05.12.2012 10:07, abang wrote:

> I wonder how can a answer packet from our PowerDNS Recursor (3.4-pre)
> exceeds 512 bytes.

By means of DNS Extensions. http://tools.ietf.org/html/rfc2671

> I thought this is the limit and it should be truncated.

The hard limit is 64kBytes, though most nameservers limit their answers 
to 4kB or less. That's usually configurable but I can't figure out the 
config options for pdns right now, if there are any.


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