First at all a great huge thanks to @stephdl for your work!!
I’ve installed fail2ban, shellinabox, crontabmanager and urbackup.
All 4 are working correctly on my system.
Found only one restriction in shellinabox. Works only when ssh-port is set to 22.
How to change when ssh port is different? Is it possible to add this? 
May the force be with you (and never run out.) 