If you want to exclusively use SSL (HTTPS) and disable HTTP, do the following:
- Delete the line <Connector port="8888"/> in the psa_x.y.z/conf/server.xml file.
- From the main menu, click Settings > Site.
- Click Edit Settings.
- Change the http to https in the URL prefix.
- Click Save.
- Restart the application
Any changes you make to the server.xml must be manually copied over after every upgrade.