[c-nsp] NTP Setup

[Rob Seastrom]

Lee <ler762 at gmail.com> writes:

> You should have at least three NTP servers.

Actually you want a minimum of four.  Detecting falsetickers is a
variant of the Byzantine Generals Problem.

Five or more is better.  ntpd won't use more than ten simultaneously,
but you're way way down the long tail of diminishing returns with more
than 8 or 9.

http://support.ntp.org/bin/view/Support/SelectingOffsiteNTPServers

-r