[Pdns-users] How to debug / log more info about: pdns operation not permitted.

[bert hubert]

On Wed, Jun 15, 2016 at 09:41:29PM -0400, Stijn Jonker wrote:
> Hi all,
> 
> In my (small) home setup I have been running for a couple years pdns/pnds-recursor. The pdns with the gmysql backend.
> 
> Initially on ubuntu and recently on Centos7. In both instances I receive
> these, as shown below, syslog messages a couple times a day.  The total
> amount of queries is low, as it's a home network.
> 
> Jun 15 04:12:03 emani pdns[2228]: Unable to send a packet to our recursing backend: Operation not permitted
> Jun 15 04:59:04 emani pdns[2228]: Unable to send a packet to our recursing backend: Operation not permitted
> 
> A google and maillist search turned up some "Unable to send packet" but none with the reason "Operation not permitted"

Hi Stijn!

>From when this happened historically, it was always iptables related on
Linux.

I can't explain why this would be an intermittent error though.

Can you double check if you might have an iptables rule that could be
involved? Note that iptables needs an explicit rule to know -i lo is ok!

	Bert