Atomic time source failure at NIST Gaithersburg campus

I wonder if it’s a response to this https://www.reuters.com/world/china/china-accuses-us-cyber-b...

Huh, I guess it's best to think of each site's NIST NTP servers as 'load-balancers' in front of a single 'application server'.

Fun fact: Per [0], if you provide enough servers, the NTP client can detect a "falseticker" that is not providing accurate time. The number of NTP servers required is `2n+1` where `n≥1`.

Of course, that requires each NTP server use its own time source.

So, note for me: If I want NTP redundancy and I'm using NIST's servers, pick one NTP server from each of NTP's three sites.

[0]: https://support.ntp.org/Support/SelectingOffsiteNTPServers#U...

Good to know they have multiple backup clocks across the continental US.