To set up a LAN cable connection on a PlayStation 4 (PS4) to the internet, you can follow these steps:
Ensure both the router and PS4 are powered on
Connect one end of an Ethernet cable to an open port on the router
Connect the other end of the Ethernet cable to the PS4 console
On the PS4 home menu, select Settings
Select Network
Select Set Up Internet Connection
Select Use LAN Cable
Select Easy
The connection should be set up automatically.
Before accessing online features on the PS4, the system software needs to be updated to the latest version. System software updates are downloaded automatically when available, and an on-screen notification will appear when it's ready to install.