I have a Wibutler(1 gen) that can't be managed with a remote connection. The Wibutler is connected via LAN cable to the ISP's Fritzbox 7530 and is registered in cloud with a Wibutler ID. When I run the app in my smartphone with 4G, the app show me the list with the registered wibutler with the cloud icon but when I tap the button the app show me indefinetely the message "Connection to xxxx was established" without going further.
Do I have to enable some tcp port forwarding on the Fritzbox? If yes which ones?
Thanks in advance.