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What is Port Scanning?

This is often used by attackers to identify running services on a host with the view to compromise it.

A port scan can be defined as a process that sends client requests to a range of server port addresses on a host, with the goal of finding an active port. While not a nefarious process in and of itself, it is one used by hackers to probe target machine services with the aim of exploiting a known vulnerability of that service.

You cannot prevent third parties from scanning for open ports. Depending on their objective, some hackers employ automated software that will scan thousands of IP addresses every day.
The best thing you can do is tune your Firewall/router to CLOSE/Disable any incoming and outgoing ports that are not being used. If there is no reason you need to remotely connect to your computer, then you should disable all incoming ports.


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