[ntp:questions] WARNING: someone's faking a leap second tonight

irtermite at gmail.com irtermite at gmail.com
Thu Aug 30 17:01:47 UTC 2012


On Wednesday, August 1, 2012 12:08:40 PM UTC-5, steven Sommars wrote:
> The main standard says a leap second is allowed in any month.  That's what
> 
> the reference ntpd does.
> 
> See ITU-R, TF460, STANDARD-FREQUENCY  AND  TIME-SIGNAL  EMISSIONS.
> 
> This link may work:
> 
> http://www.itu.int/dms_pubrec/itu-r/rec/tf/R-REC-TF.460-6-200202-I!!PDF-E.pdf
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> 
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> On the other hand Bulletin C (
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> ftp://hpiers.obspm.fr/iers/bul/bulc/bulletinc.dat) says December or June.
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> 
> Take your pick.
> 
> 
> 
> On Wed, Aug 1, 2012 at 10:54 AM, Rob <nomail at example.com> wrote:
> 
> 
> 
> > steven Sommars <stevesommarsntp at gmail.com> wrote:
> 
> > > I've seen no evidence of a denial of service attack, bugs are more
> 
> > likely.
> 
> > >   Several stratum one servers have been advertising LI=1 continuously for
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> > > the past month.   Others alternate between LI=0 and LI=1.
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> > > Most servers claim to run ntpd.
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> > >
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> > > There are over 10 stratum one's that advertise LI=1 as of Wed Aug  1
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> > > 14:18:51 UTC 2012.   Unless this changes another false leap second could
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> > > occur on August 31, 2012
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> >
> 
> > When a leapsecond occurs as a result of these bits that is a bug on
> 
> > its own, because leapseconds can only occur at the end of a quarter.
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> >
> 
> > _______________________________________________
> 
> > questions mailing list
> 
> > questions at lists.ntp.org
> 
> > http://lists.ntp.org/listinfo/questions
> 
> >

Yes, for future notifications of the real authority on leap seconds, simply go to http://hpiers.obspm.fr/eop-pc/index.php?index=bulletin_registration&lang=en and add yourself to the C Bulletins.  You will receive regular updates on when they will occur, or if the next possible block is not to occur.



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