[Pdns-users] pdns server fails every morning when it starts getting used.

[Peter Nunn]

Hi Guys,

I'm still getting these lockups on the pdns setup.

I'm having to restart the server every morning at about the same time the 
first user hits it in anger and then it seems to run for the rest of the day 
happily (with a few of the offending timeouts now that it's pointing to 
8.8.8.8).

When it's not happy, it seems every request fails with a timeout but I can 
still dig names on 8.8.8.8 from the server itself.

Any other ideas for fault finding this?

Thanks.

Peter.

-- 

Director
InfoTeq Pty Ltd
0412 174 230
03 9017 2707
On Fri, 9 Jan 2015 01:12:59 PM Peter Nunn wrote:
> Thanks for the input so far guys.
> 
> I'm running version 3.0 according to pdns_control and have tried changing
> the recursor to 8.8.8.8 (I initially tired another isp's dns but that broke
> as it was not forwarding requests from domains outside its own).
> 
> With it set to 8.8.8.8 I'm still getting a lot of timeouts in the log. After
> restarting pdns it usually works fine for a number of hours, then the
> timeouts start to build up it seems.
> 
> However, even with the timeouts at the moment it still seems to be
> processing requests.
> 
> Peter.
> 
> > On Thu, Jan 08, 2015 at 09:17:38AM +1100, Peter Nunn wrote:
> > > I've got a pdns server at one site that is causing me massive headaches.
> > > Every morning when the staff come in and start using it (and were not
> > > talking large numbers) it fails to serve external dns and has to be
> > > restarted (usually) or rebooted.
> > 
> > Which version of PowerDNS do you run?
> > 
> > The recursor you specify is in fact an open recursor. This means it is
> > likely participating on DNS reflection attacks, and might therefore be
> > slow
> > at times.  From here (in europe at least) is is very slow, so the timeout
> > may actually be real.
> > 
> > Does a restart always fix the issue for you?
> > 
> > > but as far as I can determine, the recursed dns server is quite happily
> > > returning results.
> > 
> > Can you check 'dig ds9a.nl @220.233.0.4' whenever you find that PowerDNS
> > is
> > having problems with your recursor?
> > 
> > 	Bert
> 
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