Care to go into a little more detail? For those of us who are not so techy. What is it, why is it bad, and how do we stop it?
It is rather odd they're doing the scan. I'll try my best to explain.
Every device, such as a computer, has many "ports" that each serve a specific purpose. Think of a port to what a door is to a house - each door has a specific purpose, such as closet or bathroom or pantry.
Some ports are "well known". For example, port 25 is used for email routing. Ports 80 and 443 are used for World Wide Web traffic (you know, the stuff you see in your browser).
Other ports are "wide open" for non-specific purposes, such as a smart wall plug or Wifi light switch, or some other unique device.
Port scanning is the act of "searching for any
open ports on a device" (like on a computer). Think of it like this ... you're inside an unfamiliar house, so you go to every door and attempt to open it to see what's behind the door or gain access to the room.
Most computers will "lock" any ports not in use - that would be akin to a locked door. You know the door is there, but you can't "get in" without the key.
This is how "hackers" look for vulnerabilities on a computer, so they can "break in". They look for open ports (unlocked doors), so they can gain access to the computer.
I'm not saying eBay is being malicious ... but "why" are they doing it? They say they are doing it for "fraud protection". Personally, I'd block the activity, but then again, i never purchase from eBay : )
Here's one article exploring this
Going, going, gone too far? The world's most famous online auction site probes your computer when you connect. Here's why, and what you can do about it.
www.forbes.com