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  • Tasks for the weekend – October 16, 2021 – what ports are open?

    Posted on October 17th, 2021 at 00:40 Comment on the AskWoody Lounge

    Youtube video here

    One of the ways a home user can see if you are vulnerable for external attacks – especially if you have devices that allow for remote access is using a port scanner. One such tool is Shieldsup from GRC. You can visit the site and have it scan typical ports.

    But keep in mind it only scans about 1000 ports on the “all service ports” and there’s over 64,000 ports that can “talk” in your computer system.

    Shields up showcases ports from the outside of your computer.  It lets you see what an attacker can see on your system from the outside.

    Green means “stealth”.

    Now mind you the attackers can still get you with browser attacks and phishing these days so I’d argue that this “direct” attack method is less likely to occur these days, but especially if you have older tech that relied on specific ports to be open, this is still a quick and dirty tool to use to check that your outside edge of your network is what you expect it to be.

    Edit 10-17-2021

    I was trying to provide the ultimate url and grc doesn’t work using the landing page.

    Try https://www.grc.com/default.htm and scroll down to the 2nd tool in the list:

    NEW SHIELDS UP! TEST: UPnP Exposure Test!

    Go to ShieldsUP! and click GRC’s “Instant UPnP Exposure Test”.