[outages] Possible NTP attacks?

[Bill Wichers]

It's probably worth noting that GPS isn't directly dependent on the
functionality of tick and tock...

Tick and tock were unreachable for about 8 hours or so back around the
4th of July after the windstorms in that area too. It's good practice to
sync to multiple timeservers to avoid single points of failure.

  -Bill

> On Nov 20, 2012, at 11:05 AM, Jay Ashworth <jra at baylink.com> wrote:
> 
> > There are what appears to be a statistically significant number of
> reports
> > this week of possible anomalies with NTP timekeeping in various
parts of
> the
> > net.
> 
> 
> Just to slightly correct and focus this - other than an unconfirmed
GPS
> report, everything I have seen reported so far either publicly or
> privately confirmed to be syncing with the USNO servers tick or tock
when
> problems manifested.  This appears - so far - to have been of limited
> scope.  Widespread, because of tick and tock's popularity and (as Leo
> Bicknell noted elsewhere) widespread use of too few upstream servers
in
> local configurations.  But not widespread among the stratum 1 servers
set.
> 
> 
> George William Herbert
> Sent from my iPhone
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