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Hello,
Usually, when configuring the firewall, only the ports on which a service is running are left open and the rest of the ports are closed. For example, they open ports 80 and 443 for Apache and close the other ports.
When a service is not running on a port, why should that port be closed?
This is sort of like the "Principle of Least Privilege." Basically: computers are really awful at knowing when to say "yes," but terrific at saying "no!"
Start by locking every single one of the gates that lead into the pastures where your prize horses are being kept. Then, very-specifically unlock only the handful of gates which must be open, always knowing precisely why you did so.
Also(!) explore additional technologies such as OpenVPN, which you can use to create a "moat" around your entire installation.
Last edited by sundialsvcs; 02-15-2024 at 07:37 PM.
So that if something misbehaves, or malware gets past and wants to open a port, you are still protected
Thinking of the time I illegally torrented Windows software and ran it, then later found that my computer was running a TinyFTP server. Good thing the FTP port was closed.
And if you want to judge me for my bad judgement: it was how we lived those days.
Thinking of the time I illegally torrented Windows software and ran it, then later found that my computer was running a TinyFTP server. Good thing the FTP port was closed.
And if you want to judge me for my bad judgement: it was how we lived those days.
Hello,
Thank you so much for your reply.
Are you saying that a malware has installed TinyFTP on your system via torrent?
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Why should all ports be closed?
