Apr 13, 2013 · Port 443 is used for all https sites. If you close it you will not be able to browse or otherwise connect to any secure websites or servers. 443 is the standard port that all web browsers use to establish SSL connections.
Difference Between HTTPS Port 443 and Port 8443 Mar 01, 2018 List of TCP and UDP port numbers - Wikipedia 248 rows
Jul 20, 2020
Using a Custom port other than port 443 to access remote Oct 09, 2014
The Electronic Frontier Foundation, opining that "In an ideal world, every web request could be defaulted to HTTPS", has provided an add-on called HTTPS Everywhere for Mozilla Firefox, Google Chrome, Chromium, and Android, that enables HTTPS by default for hundreds of frequently used websites.
What’s an SSL port? A technical guide for HTTPS - GoDaddy Blog Nov 02, 2017 Why was 80 Chosen as the Default HTTP Port and 443 as the Nov 15, 2015 Difference Between HTTPS Port 443 and Port 8443 Mar 01, 2018