How to block port scan attempts in the network using C# or VB.NET?

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I am developing an application that blocks port scanning attempts on the network to prevent device security breaches. I'm looking for someone to guide me how to block port scan in windows using C# or VB.NET.

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I am developing an application that blocks port scanning attempts on the network to prevent device security breaches. I'm looking for someone to guide me how to block port scan in windows using C# or VB.NET.

Posted 25-Jul-21 0:01am

Ṉobody

Updated 25-Jul-21 21:14pm

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Dave Kreskowiak · Accepted Answer · 2021-07-25T05:12:00

Simple. You don't.

This is a firewall configuration issue. If you're trying to block "port scans" from a certain machine, you have to block all outbound ports that are not normally used.

If you're trying to block incoming scans, well, you setup inbound rules to block everything coming into the machine that isn't normally used.

You cannot block all ports because, well, that would be equivalent to pulling the network cable out of the machine and I don't think you want that.