DCoda

This plugin is only supported on PHP 5.2 or greater.
 
MembersBlog easily allows you to lock down your blog to members only. 
Unauthenticated visitors who try to view the blog content will be forced to the login page , or presented with an browser login prompt if they try to view the feed.
When the blog and feed are locked down to subscribe to a feed using a feed reader a username and password must be supplied in the url:
<pre><code>http://{username}:{password}@{feed url}
</code></pre>

If you are having trouble and cannot find the answers in the <a href="http://membersblog.dcoda.co.uk/help/faq/" rel="nofollow ugc">FAQ</a> you can post your support questions to the <a href="https://wordpress.org/tags/members-blog" rel="ugc">WordPress Support Forum</a>
If you find MembersBlog useful please rate it at <a href="https://wordpress.org/extend/plugins/members-blog/" rel="ugc">wordpress.org</a> and please consider making a <a href="http://membersblog.dcoda.co.uk/donate/" rel="nofollow ugc">donation</a> to help us set aside more hours to maintain MembersBlog
MembersBlog is written by <a href='http://dcoda.co.uk' rel="nofollow ugc">dcoda</a>
You can check out our other plugins <a href="https://profiles.wordpress.org/users/dcoda/" rel="nofollow ugc">here</a>
If you require a custom plugin you can contact us <a href="http://dcoda.co.uk/contact/" rel="nofollow ugc">here</a> and maybe we could write it for you.
<h3>Copyright</h3>
(c) Copyright DCoda Limited, 2007 -, All Rights Reserved.
This code is released under the GPL license version 2, available here:
<a href="http://www.gnu.org/licenses/gpl.txt" rel="nofollow ugc">http://www.gnu.org/licenses/gpl.txt</a>
There are so many possibly configurations of installation the plugin can be installed on we limit testing to a PHP 5.2+ Linux platform running the latest version of WordPress at the time of release but it is released WITHOUT ANY WARRANTY; 
 without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

MembersBlog

Lock down all your posts and pages so only members can access them

Code For Broke

Must Login is a lightweight, user-friendly plugin that allows you to require login for your entire site with just one click. Perfect for membership sites, private blogs, intranets, or any site that needs to restrict access to registered users only.
<h4>Features</h4>
<ul>
<li>One-Click Toggle – Enable or disable login requirement instantly from the admin bar</li>
<li>REST API Protection – Configurable authentication requirement for REST API endpoints</li>
<li>Automatic Cache Clearing – Automatically clears popular caching plugins when toggling protection</li>
<li>Admin Bar Status Indicator – Always see at a glance whether login is required</li>
<li>Simple Settings Page – Easy-to-use settings interface</li>
<li>Admin Override – Administrators always have access, even when login is required</li>
<li>Smart Redirects – Users are redirected to login and then back to their intended page</li>
<li>Selective Endpoint Access – Allow specific REST API endpoints for forms and authentication</li>
<li>Cache Compatibility – Works with WP Super Cache, W3 Total Cache, WP Rocket, and more</li>
<li>No Configuration Needed – Works perfectly out of the box</li>
<li>Lightweight – Minimal impact on site performance</li>
<li>Translation Ready – Fully internationalized and ready for translation</li>
</ul>
<h4>How It Works</h4>
<ol>
<li>Install and activate the plugin</li>
<li>Click the lock icon in the admin bar to toggle login requirement</li>
<li>That’s it! Your site is now protected</li>
</ol>
When enabled, all visitors must log in to view any page on your site. Administrators can quickly toggle this on or off from anywhere on the site using the admin bar.
<h3>Developer Documentation</h3>
<h4>Filters</h4>
cfb_must_login_redirect_url – Customize the login redirect URL
<pre><code>add_filter('cfb_must_login_redirect_url', function($redirect_url, $redirect_to) {
 return 'https://example.com/custom-login';
}, 10, 2);
</code></pre>
cfb_must_login_allowed_rest_routes – Allow additional REST API endpoints
<pre><code>add_filter('cfb_must_login_allowed_rest_routes', function($routes) {
 $routes[] = '/my-plugin/v1/public';
 return $routes;
});
</code></pre>
<h4>Actions</h4>
cfb_must_login_clear_cache – Triggered when cache is cleared
<pre><code>add_action('cfb_must_login_clear_cache', function() {
 // Custom cache clearing logic
});
</code></pre>
<h4>Capabilities</h4>
The plugin uses the <code>cfb_must_login_manage</code> capability, which is mapped to <code>manage_options</code> by default. You can customize this using the <code>map_meta_cap</code> filter.

CFB Must Login

Require users to log in before viewing your site with easy admin toggle controls. Includes REST API protection and automatic cache clearing.

MembersBlog vs CFB Must Login