Ethernet connected devices


First off, can you navigate into your router settings panel ?
It's done thru your web browser.

You'd need the IP of your router which most times is 192.168.1.254 (the IP may be written on the underside of the router).
Type that into your Browser's address bar and go to it. It should open up a page with your router panel.
You need Username and Password.
Most routers have that info on the bottom of the router.
If after entering that info and still doesn't allow you in to the panel, then use the Change Password function and retry with new password.

Okay once in that router panel, Go into main Status area. And then into Lan Services and Lan Status.
In there is where you'll see all Mac Addys of all devices connected to your router.
Some will be shown with the device name (Jynxbox or an Android box for examples) and some will be shown as unknown. The unknown ones may include devices currently powered off.