This is an internal backup/secondary device, it is not reachable from the internet!
This is an internal testing device, it is not reachable from the internet!
Refclock: uBlox Neo m8t HAT on a Raspberry Pi 3 Model B+ Rev 1.3
All graphs generated with ntpviz.
Many elements shamelessly cadged from Royce Williams' NTP resource site.
This site tests "A+" on the Qualys SSL Labs Server Test page.