Then Ducks managed to modify the Firewall by opening the port ( is very simple in reality because it opens the firewall and activates an extras function from which a window allows you to enter 8080, tcp, udp etc.);
in fact, I was able by another PC in the LAN to see and use the functions of Calibre; Firewall was on.
Given the success I wanted to try via the Internet with my public address. I checked the port forwarding, and I ran for the test; but unfortunately nothing happened of what I hoped.

For the moment thank you very much Ducks for the technical and spiritual support.
a bientot
sonia
P.S. the story continues... until the next episode.