HA and Adguard - Boot Problems

Hi,

I am using a virtual machine on my NAS in order to run HomeAssistant with Hassio.
I activated adguard in order to block ads in my network. Thats why I also set DNS-setting of my router to the IP of HA. In case of an reboot there is the problem that HA does not come up because the ntp-server is not reachable (adguard is not running on this state).

Thats why I wanted to change default timeserver on my virtual machine. Sadly I cannot find any setting (like timesyncd…conf) in the vm. I installed the terminal / ssh access in order to search for it, i also tried to find strings like time.google.com but there is nothing.

What I am doing wrong?

Thanks

Moppi