bind says 'clocks are unsynchronized' but they are not

[Niklas Jakobsson]

Hello,

On ons, 2010-07-07 at 14:41 +0200, Tom Schmitt wrote:
> -------- Original-Nachricht --------
> > Datum: Wed, 07 Jul 2010 13:13:45 +0200
> > Von: Niklas Jakobsson <nico at autonomica.se>
> > An: bind-users at isc.org
> > Betreff: bind says \'clocks are unsynchronized\' but they are not
> 
> > Hello,
> > 
> > I have some problems with our bind servers complaining that 'clocks are
> > unsynchronized' when doing zone transfers with TSIG. The problem is the
> > clocks are correct, synced with ntp and everything. 
> 
> Maybe one of the two servers doing the zone transfer is running in a chroot where it has another time setting than the server itself?
> 

Not running any chroot.

> 
> > 
> > The problems seems to occur mostly on zone transfers that take a long
> > time (ie. hours). 
> > 
> 
> HOURS??
> There is defnitly something wrong. I cannot imagine a zone so big or a connection so slow that a zonetransfer could take hours. Or do you make a axfr of the tld com. over a serial connection?  ;-)
> 
> 
> Tom.
> 

Size of a tld that should not be named: 256947194 bytes
Speed of connection to a site very far away: 256 kbit/s

256947194/(256*1000/8)/60/60 = 2.23 ~ little over 2 hours...

 /Nico