@enrico.mcc can you do a very quick test?
Download from BTicino this client:
https://www.myopen-legrandgroup.com/developers/ then tab TOOLS then download and run OpenWebNet Client - Windows (exec file is OpenWebNet_Client.exe).
There you can put the IP address of your MyHomeServer1 and text password, select HMAC and the click on the green OpenEvent button.
If the near button Event Connected becomes red, then your client is connected to MyHomeServer1 and you can try to activate any of your physical devices and you should be able to receive events on the log window below the buttons.
Can you the test it and tell us what happens (may post an image)?
If you succeed in connecting and receiving events on the client, the MyHomeServer1 can be used as OpenWebNet gateway !
Thanks,
MASSI