Package: systemd Version: 255.4-1 Tags: sid It looks like Systemd's timedatectl does not recognize ntpsec. Using it results in 'NTP service: n/a':
$ timedatectl Local time: Wed 2024-03-06 12:35:32 EST Universal time: Wed 2024-03-06 17:35:32 UTC RTC time: Wed 2024-03-06 17:35:32 Time zone: America/New_York (EST, -0500) System clock synchronized: yes NTP service: n/a RTC in local TZ: no According to <https://wiki.debian.org/DateTime#Installing_NTP>, ntpsec is an option for Debian 11 and below; and default for Debian 12 and above. I searched for an upstream bug at <https://github.com/systemd/systemd> (is that the right place?), but there were no relevant hits. See <https://github.com/systemd/systemd/issues?q=is%3Aissue+ntpsec>. Also see <https://lists.debian.org/debian-user/2024/03/msg00145.html>. That's the debian-users mailing list discussion with GW's comment.