Thank you PaulS!
That meas that everything that matters is the port used for port forwarding, am I wright?
If my home's router allows outband connections on the port I chose, data packets will be sent just for device configured on that port, no matter IP and MAC ?
If is so, I lost so much time, be cause of some tutorials about port forwarding, where they say that first thing to do is to set-up a static IP address if you want your device to be accessed from internet.
Juraj, I've copied just first 3 bytes of IP, then the last is "1". (that's my router's gateway).