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Can someone demystify computer Ports for me? Please? Blocking, unblocking, opening, allowing, VPNs and their effect, what ports are and what they do, step by step, when you have to interact with them? (lemmy.dbzer0.com)

submitted 7 months ago by Melatonin@lemmy.dbzer0.com to c/asklemmy@lemmy.ml

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It's the one thing when I'm configuring things that makes me wince because I know it will give me the business, and I know it shouldn't, but it does, every time. I have no real idea what I'm doing, what it is, how it works, so of course I'm blindly following instructions like a monkey at a typewriter.

Please guide me into enlightenment.

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[–] Galli@hexbear.net 4 points 7 months ago* (last edited 7 months ago)

The top cat uses ports to sort messages based on application.

Think pigeon holes, applications usually use protocols which are assigned a number by convention. The application gets it's message out of it's assigned ports instead of having to sort through all the messages.