On 2026-03-10 11:20, Polarian wrote:
> I have heard of people who setup their own local timeservers using a
> SBC and an antenna for GPS.
When everything works as it should, that can be an excellent source of
accurate time. You don't even need to dedicate a computer to it. There
are serial-over-USB GPS receivers that ntpd(8) can use as a timedelta
sensor (source of NMEA-0183 protocol time).
It's worth noting that GPS spoofing is not too uncommon, so it's not
a bullet-proof solution. While spoofing requires the right combination
of proximity and signal power, it's not that hard to do, as regular
GPS signals are extremely weak. Such spoofing devices cost from a few
hundred €/$ and up. It seems that some generic SDRs can do it, too.
Then there is Network Time Security, RFC 8915, which has TLS.
That will take some work to use with OpenBSD, though.
--
Åke Nordin <ake.nordin@netia.se>, resident Net/Lunix/telecom geek.
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