Plugin or Module?
Use the Plugin for the whole site
- Open System > Manage > Plugins.
- Search for System - Right Click Disable.
- Open it and set your options on each tab.
- Set Status to Enabled.
- Click Save.
Extra plugin options: skip some user groups, components, or URL paths.
Use the Module for selected pages
- Open Content > Site Modules.
- Click New and choose Right Click Disable.
- Set Title (anything is fine).
- Set Show Title to Hide.
- Choose a Position (any visible position works; many people use debug while testing).
- Open Menu Assignment and pick the pages you want to protect.
- Set Access (who should get the rules). Public is common.
- Set Status to Published and Save.
- Make sure the system plugin is Disabled if you only want the module.
Simple rule
If the module admin shows a yellow warning that the plugin is enabled, turn one of them off. On the same page, the plugin wins.