2.1) Cable
Connect the router to the modem or main router via Ethernet cable to
access the Internet.
Before plugging the Ethernet cable into the WAN port of the router, you can
click Use as LAN to set the WAN port as a LAN port. That is useful when
you are using the router as a repeater. As a result, you can have one more
LAN port.
Plug the Ethernet cable into the WAN port of the router. The information of
your connection will be shown on the Cable section. DHCP is the default
protocol. You can click Modify to change the protocol.