WP Redirect to Live is a simple plugin to redirect not logged in users to another URL. For example you can disable access to beta instance and redirect all not logged in users to live site or you can just use it when you migrate your website to another domain.
- redirect not logged in users to specific URL
- return 404 Not Found page
- add meta robots “noindex”
Project page and more informations: https://github.com/damianwajer/wp-redirect-to-live