OK...I already planned for october to set up my DIY-NAS fresh...I wish I had time earlier...but the "never change a running system" is holding me back... samba, syncthing and pihole are working now.
I wish I had a network-based backup-solution. "urbackup" depends on libcurl3, but 18.04 LTS what I have running on my odroid is shipped with libcurl4. After I did what I found in forums to override dependencies the "problems" with pihole began...
Thank you for your help and time!!! Pihole is a great piece of software!!!
Bye