Bingo !! 😀
I replaced my hub modem/router by a regular “Netgear” switch and finaly my M1001 can access to my library.
Unfornately, I can’t access to my modem/router settings. This device is provide by my ISP so I can’t grant any access on it.
The solution is to buy a switch device for internal communication.
If that help someone my routeur is a Bewan ibox and provider is Tele2.
Thanks, stretch your first idea was the good one.