On Mon, 14 Aug 2023, Masataka Ohta wrote:
Mike Hammett wrote:
" As such, the ultimate (a little expensive) solution is to have
your own Rb clocks locally."
Yeah, that's a reasonable course of action for most networks.
For most data centers with time sensitive transactions, at least.
*sigh*
https://en.wikipedia.org/wiki/Atomic_clock
Modern rubidium standard tubes last more than ten years,
and can cost as little as US$50.
https://www.ebay.com/sch/i.html?_nkw=rubidium
From this discussion it seems there is very little overlap between nanog
membership and time-nuts.
Cheap Rb GPSDO are well known there. Even a bottom barrel OCXO GPSDO would
provide significant protection against determined GPS attacker.
-Dan
