Workaround:
# cat /etc/rc.local
#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.
iptables -I INPUT -p tcp --dport 4190 -j ACCEPT
exit 0
I really do not understand how this fail2ban works and in which way thees iptable-rules are generated...
:-?