[ntp:questions] ntpdc and collectd queries timeout

Michał Purzyński michalpurzynski1 at gmail.com
Fri Jan 24 16:38:36 UTC 2014


On Friday, January 24, 2014 3:46:16 PM UTC+1, David Lord wrote:
> Steve Kostecke wrote:
> 
> > On 2014-01-24, David Lord <snews at lordynet.org> wrote:
> 
> > 
> 
> >> On NetBSD-6 i386 ntp-dev-4.2.7p410
> 
> >> $ ntpdc -c kern
> 
> >> localhost: timed out, nothing received
> 
> >> ***Request timed out
> 
> >>
> 
> >> Perhaps that is intended behavior for 2014 given recent
> 
> >> DDOS attacks?
> 
> > 
> 
> > According to http://archive.ntp.org/ntp4/ChangeLog-dev
> 
> > mode 7 requests were disabled more than 2 years ago:
> 
> > 
> 
> > (4.2.7p230) 2011/11/01 Released by Harlan Stenn <stenn at ntp.org>
> 
> > * Disable mode 7 (ntpdc) query processing in ntpd by default.  ntpq is
> 
> >   believed to provide all functionality ntpdc did, and uses a less-
> 
> >   fragile protocol that's safer and easier to maintain.  If you do find
> 
> >   some management via ntpdc is needed, you can use "enable mode7" in the
> 
> >   ntpd configuration.
> 
> > 
> 
> 
> 
> Before joining the pool in 2009 I'd changed most of my  monitoring
> 
> scripts to use ntpq rather than ntpdc.
> 
> 
> 
> $ ntpq -c kerninfo me6000e
> 
> associd=0 status=011d leap_none, sync_pps, 1 event, kern,
> 
> pll offset:     -0.000148
> 
> pll frequency:
> 

Thanks for all the answers. I will rewrite my monitoring scripts to use the ntpq than. It looks like all the code for type 7 packets is still there, it's just disabled by default.



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