Xb6 Gateway can’t access admin to change setting

I need to access the Gateway admin tool to disable MAC address filtering in order to setup a LAN for my Epson printer. I just received this Xb6 Gateway and I can’t use my printer on my Wi-Fi network. I checked the button to allow me access, but can’t Logon

The gateway does not accept any password in the Logon screen.

can someone tell me how to get past the Logon ?