How to configure a Joomla site to use HTTPS
If you want to reconfigure your Joomla! website open via HTTPS instead of via HTTP, you can do that via the Joomla! administrator panel. Once inside go to the System tab -> Global Configuration -> Server. Then from the drop down Force HTTPS choose either Administrator Only or Entire Site.
Choosing Administrator Only will only secure the administrator section of your website and its front-end will still open via HTTP.
The Entire Site option will force HTTPS on the entire website and all of its pages will be loaded via HTTPS. This is the recommended option.
You can also enable HTTPS on the entire website using Joomla!'s .htaccess file.
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