At 1:28 AM -0700 2005-09-08, Ask Bjørn Hansen wrote:
I thought 3 servers were supposed to be enough to protect against
a false-ticker?
No. 3 is the absolute minimum you need to be able to reliably
select a syspeer, but if-and-only-if all three clocks are "sane".
You need at least four to protect against a single falseticker, five
to protect against two false tickers, etc....
See
<http://ntp.isc.org/bin/view/Support/SelectingOffsiteNTPServers#Section_5.3.3.>
for details.
--
Brad Knowles, <[EMAIL PROTECTED]>
"Those who would give up essential Liberty, to purchase a little
temporary Safety, deserve neither Liberty nor Safety."
-- Benjamin Franklin (1706-1790), reply of the Pennsylvania
Assembly to the Governor, November 11, 1755
SAGE member since 1995. See <http://www.sage.org/> for more info.
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