Every night between 01:30 and 08:00 queries to x.debian.pool.ntp.org every 5 seconds

[deHakkelaar]

@deHakkelaar

sudo ss -np | grep ntp

ps -C ntpd

ntpq -p

apt policy ntp

Sorry but I gave you wrong info probably.
My Pi-hole setup was upgraded from Wheezy to Jessie to Stretch so it still had old fashion ntpd installed for syncing time.
Current distro's use below:

Pi suddenly stopped working

Sorry, I noticed current distro's with systemd use below one for time sync instead of old fashion ntpd: $ man systemd-timesyncd.service [..] DESCRIPTION systemd-timesyncd is a system service that may be used to synchronize the local system clock with a remote Network Time Protocol server. It also saves the local time to disk every time the clock has been synchronized and uses this to possibly advance the system realtime clock on subsequent reboots to en…