First of all: thanks again for your great support!
root@Debian:~# ps aux | egrep rclone
root 5614 0.0 0.8 741548 34672 ? Ssl Sep19 0:07 /usr/bin/rclone rcd --rc-web-gui-no-open-browser --rc-addr=10.0.0.3:5572 --rc-user xxx --rc-pass xxx --rc-web-gui-update
root 31232 0.0 0.1 31936 5572 ? S 11:40 0:00 journalctl -q --lines=10 --output=json --follow -- _SYSTEMD_UNIT=rclone-webgui-starten.timer + COREDUMP_UNIT=rclone-webgui-starten.timer + UNIT=rclone-webgui-starten.timer
root 31234 0.0 0.0 6144 820 pts/0 S+ 11:40 0:00 grep -E rclone
Telnet from local is working:
root@Debian:~# telnet 10.0.0.3 5572
Trying 10.0.0.3...
Connected to 10.0.0.3.
Telnet from remote is working on default port, but not on port 5572 (does not connect without error).
root@Debian:~# netstat -tuanp
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 10.0.0.3:5572 0.0.0.0:* LISTEN 5614/rclone