I have rebooted the modem. I have tested each port but none are working. I switched out my ethernet cables. I have tested multiple devices but can't get an ethernet connection. Wifi is working fine though. I have made sure the coaxial cable connection is tight. I haven't made any changes to my network it just suddenly stopped working since last night. Please advise with what I can do. The modem is less than a year old.
You could try hard resetting the device to factory defaults by pressing and holding in the recessed reset button on the rear for 30 seconds. Be advised that you will lose any customized settings, and they will need to be re-configured from scratch. Good luck ! YMMV.