Package: clock-setup
Version: 0.155
Severity: important
The user-provided NTP server address (in this case a 10(dot) IP address)
provided during the initial Debian installation is not used by
systemd-timesyncd in the running system. This has been noted on systems
installed from Debian 11 NetInst images.
On systems with outbound network restrictions, this results in the clock never
becoming synchronised, and log messages being reported in /var/log/syslog that
requests to debian.pool.ntp.org servers are timing out.
/etc/systemd/timesyncd.conf appears to be unchanged from the default packaged
config file, with all lines commented out.
A work around is to manually adjust the config after installation, however
people unfamiliar with the bug (myself included until very recently) will
likely not think to check, believing this has already been covered off during
the Debian installation.