Hacker News new | ask | show | jobs
by signal-intel 387 days ago
No GPS in SCIFs. Agree ntp would be great. Also I’d prefer a way to manually switch between a fixed set of time zone, or even just showing UTC always as an option.
1 comments
sneak 387 days ago
How do SCIFs do time? Do they use optoisolated network connections and then do time sync over that? (SIPRnet, is it?)
link
signal-intel 387 days ago
The US Navy maintains NTP servers on a variety of networks, the public internet and SIPR included.

https://www.cnmoc.usff.navy.mil/Our-Commands/United-States-N...

link
offmycloud 386 days ago
If you have a special project need, you might be able to get one-way IRIG time signal on fiber with guard boxes at both ends. There's really no technical reason why you couldn't do analog GPS baseband over fiber, but you do need approved equipment at both ends for policy reasons. (certified for no backflow)
link