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Why was 80 Chosen as the Default HTTP Port and 443 as the Nov 15, 2015 How to open PORT : 443 | DigitalOcean Apr 04, 2017
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How to disable a 443 port on computer? - IT Security Apr 13, 2017 How to Open Port 80 & 443 in FirewallD – TecAdmin Mar 23, 2020
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ssl - HTTP over port 443 vs HTTPS over port 80 - Server Fault :80 and :443 refer only to the server port in use (i.e. it is "just a number") and carries no significance at all with regards to security. However, there is a strong convention to send http over port 80 and https over port 443, which makes the combinations in the question more than a little unorthodox. tls - SSL protocol : Port 443 - Information Security Stack The short answer is this: When you connect on port 443, the entire handshake happens on port 443. This can be done in a secure fashion as a result of the Diffie-Helman process, which allows public keys to be exchanged in the open without fear that the communication secret that results from the communication might be calculated or guessed by an attacker. Find out what's blocking port 80 / 443 on Windows Annoying, to say the least, is when you want to bind to a specific port (say the default HTTPS port 443) but you are unable to do so due to some other TCP-server already using it. This is how you find what task that is currently listening on the default HTTPS-port 443. Open the Command Prompt (cmd.exe) and execute the following