How to configure WordPress to use my own private SSL certificate?

If you have a private SSL installed for your domain, you can make WordPress run over SSL by following these steps:

Step 1: Configure WordPress to work through https

Log into your WordPress site as administrator, go to Settings ->  General and in the field ‘WordPress Address (URL):’ change the ‘http://’ to ‘https://’. Once you do this your visitors will be able to access your website both with and without SSL.

Step 2: Fix non-secure items on your site

Next, install the SSL Insecure Content Fixer plugin to your application. It will handle all the included elements and fix non-https resources in case such exist. Make sure to check the plugins settings if it doesn’t work out-of-the-box.