How to Protect Port 443

By Jacob Michael

Secure data transmissions help restrict port 443.
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Network port 443 is typically used for secure data transmissions -- also known as Hypertext Transfer Protocol Secure, or HTTPS -- to and from a web server. URLs that begin with "https://" are using this protocol, sending and receiving data to you using port 443. Those who want to limit user access to secure websites or are concerned with secure data being sent over the network can close port 443 completely.

Launch "Windows Firewall" by clicking the Start menu, clicking "Control Panel", then opening the "Windows Firewall" program. You can also type "Windows Firewall" without the quotes into the Start menu search box to bring up the program icon.

Click "Advanced settings" in the Windows Firewall window on the left-hand panel. A "Windows Firewall with Advanced Security" window will open.

Click "Inbound Rules" on the left window pane.

Click "New Rule..." on the right window pane. A "New Inbound Rule Wizard" window will open.

Select "Port" and click "Next".

Type "443" in the input box next to "Specific local ports:". Click "Next".

Select "Block the connection" and click "Next". Click "Next" again.

Type in a name for your new inbound rule and click "Finish".

Click "Outbound Rules" on the left window pane.

Click "New Rule..." on the right side and a "New Outbound Rule Wizard" will appear.

Repeat steps 5 to 8 to create the outbound rule and complete the process of completely blocking port 443.