Set your site to member only. All visitor will need to login to view site.

Simple SSL(HTTPS) Plugin.

This plugin redirects all not logged in users to a login page.

Ultimate content restrictions plugin with private page, private user groups,private conetnt and restrictions on menu,widgets,search,downloads based on user roles.

Disable the public site functionality, always prompt for a login before showing any content, make WordPress and intranet style site

Lock your entire WordPress site behind a single password with a branded lock screen, session or timed access, and simple admin controls.

Quick plugin to enable the setting of a site private. Includes options for with multi-site capabilities.

Allows only logged-in users to access your WordPress site and redirects logged-out visitors before they can view protected content.

Hide the public WordPress frontend behind a secret URL parameter. Anyone with the link gets in; everyone else sees a 404.

Make your WordPress site private in one click, block registration spam, and clean up existing spam accounts with staged safeguards that protect online store customers.