Inbound traffic alert (ESET) - Application: System

I have a MacBook Air (13-inch, Early 2015) Mojave version 10.14.6

I have installed ESET Cyber Security Pro a while ago, and an inbound traffic alert just popped up. "A remote computer is attempting to communicate with an application running on this computer. Do you wish to allow this communication?"

The application involved is "System", local port is TCP& UDP 52751. The remote computer is fe80::70e3:35ff:fe54:45e4, remote port is 49301.

I thought that it might be system updates, but not too sure about that so I'd rather wait for an answer before proceeding. Please advice