I recently installed Nortons Internet Security program.
Which has a firewall, virus protection, etc, etc

I was online the other day when a window poped up and said:

"Attemped attack...." hack attemp on date etc..

It also included an IP address. I as asuming that this is the attackers IP address?

What can i do with this IP address, i know that it is like the computer name etc.

But can i contact this computer Via this IP address?

Also, What is a port scanner? I downloaded a port scanner called SuperScan 3.0 for windows, and put in the IP address of my so called "hacker", and SuperScan returned :

portscan02.norton.com

What is this?, did i record the wrong IP address, or something?