Tools - GRC Network tool website

Today I would like to mention this website:

https://www.grc.com/intro.htm

It has several interesting tool, one of them it permit to check, on line open ports on your pc, public Firewall, Router, Server etc. etc.:

Open the link
“http://www.grc.com”
click on “ShieldsUP!!” link
click on “ShieldsUP!” link
click on “Proceed” button
click on “All Service Port” button

Here it is direct tool link:

https://www.grc.com/x/ne.dll?bh0bkyd2

And here it is an easy video that drive you, step by step, on relative usage: