ubd or usb?
maybe a usb device like a usb 3/4G modem?
there is routers dedicated to do just that, connect the device to the router and from the router offer the connection on the ethernet ports or wireless to other devices
on some modems what you can do is share the connection from the usb 3/4G modem to the ehthernet adapter so other machines can use it but last time i tried that, one machine had internet and the other lost access and wen i could make the other work the first one lost conection
not all the modems will let you do this, this is why i mention the router, can't find the model atm