it works! big big thanks!!
now i can setup my entire project!! :
– 2 of them via LAN & dLAN, used with Kodi (TV, movies, series, streaming) & Squeezebox Player (using USB-soundcard)
– 2 of them via WLAN, used as Squeezebox Player
– 1 of them via LAN, used as Squeezebox Server
all medias are saved on a Synology DS212.
Thanks Max2Play for providing the base. You are awesome!