Updated one of my TW 64 KDE today to the latest version, just to find out that it is now trying to contact Google time servers, which are blocked in my firewall.
Have blocked access events in my perimeter firewall logs, trying to reach:
I had a look in the logs of ntpd, there is no error for the configured NTP server and no events loged for these Google NTP servers. Must be something else…
timedatectl status
Local time: Tue 2017-11-21 11:02:22 CST
Universal time: Tue 2017-11-21 17:02:22 UTC
RTC time: Tue 2017-11-21 17:02:22
Time zone: America/Chicago (CST, -0600)
Network time on: no
NTP synchronized: yes
RTC in local TZ: no
timedatectl status
Local time: Tue 2017-11-21 18:11:27 CET
Universal time: Tue 2017-11-21 17:11:27 UTC
RTC time: Tue 2017-11-21 17:11:27
Time zone: Europe/Berlin (CET, +0100)
Network time on: yes
NTP synchronized: yes
RTC in local TZ: no
The FallbackNTP servers are hard coded to use google - see man timesyncd.conf - so even though in the default config they are commented out… they are still used unless you explicitly set your own.