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 <[email protected]>, resident Net/Lunix/telecom geek.
