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Questions on windows ports

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Last Modified: 2016-09-05
We are using Comodo Internet Security Premium version 8.4.0.5076.  Recently we were recommended to close all unused ports in each PC;  we only needed the ports opened such as:

      - Port 53 (for DNS)
      - Port 80 (for Http)
      - Port 443 (for SSL secure browsing)
      - Port 8080 (for secondary port)

And close all other ports as follows:

      - Block 0-52
      - Block 53-79
      - Block 81-443
      - Block 444-8079
      - Block 8081-65535

That seems to make sense but we have these questions about apps used in some computers, such as:

Remote Desktop
SQL
Google Drive
OneDrive
Mega cloud
DropBox
Box
iCloud
Hyper-V

What do EE recommend as to the open and closed ports?

Is the recommendation of closing non-used ports a good one?

Finally, based on the list of apps, what ports do these apps uses so we can open them?
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"Batchelor", Developer and EE Topic Advisor
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