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.

Robin W

An add-on to the bbPress forum plugin – creates private forum groups
This Plugin creates unlimited private forum groups.
Forums are then allocated to one or more groups, and users allocated to one or more groups.
What this achieves 
unlimited private groups 
Each user is set to a group or groups, and each forum can have any or all the groups associated with it 
Any number of public forums combined with any number of group forums. The group forums can be individually set to public or private. 
Forum title and description (but not topics or replies) can be set to be visible to non-group users, allowing people to see that a forum exists but not access it 
Separate pages can be set to allow redirection of non group users for sign-up or information 
Topic Permissions 
Topic Permissions is designed for sites where users need to have different permissions to different forums. 
For instance the ability for users to contribute to one forum whilst only being able to view another, or only start topics in one forum, or only reply to topics in another.
Example
So if 
User a belongs to group 1 
User b belongs to group 2 
User c belongs to group 3
and 
Forum x is set to allow group 2 
Forum y is set to allow group 2 and group 3 
Forum z is set to allow group 1 and group 3
Then 
User a can access only forum z 
User b can access forum x and forum y 
User c can access forum y and forum z
Restrictions/warnings
The widgets (bbpress) forums list, (bbpress) recent replies, and (bbpress) recent topics SHOULD NOT BE USED, as they will show topics headings and author names for all forums. Replacement widgets called (private groups) forums list, (private groups) recent replies, and (private groups) recent topics are available instead
Works with bbpress 2.5.3 or higher

Private groups

After wasting hours trying to get Skyverge's WooCommerce Memberships to do what I needed (no practical way to protect topics), I tried this and had it doing everything I needed in under 15 minutes.

Setup a group, manually assigned users to that group.
Set the forum to private and assigned that that group to it.
Viola, everything worked exactly as I wanted.

Public doesn't even see the forum exists. Group members can when logged in.  Non-members can't go directly to to topic URL and bypass the protection.

Only suggestions would be:
1. cleanup the settings pages and instructions, they're a bit overly complicated and hard to follow. 
2. some way to trigger group membership programmatically based on a WooCommerce purchase (I know, to specific and I'll probably code it myself for what I need).

Thanks again for an awesome bbp plugin!

Easy setup and protected forums exactly as I needed

For bbPress - Creates private forum groups

CFB Must Login vs Private groups