Paul Ryan

jojaba

the_elusive

Anil Natha

pkarjala

Eduardo Larequi

Authorizer restricts access to a WordPress site to specific users, typically students enrolled in a university course. It maintains a list of approved users that you can edit to determine who has access. It also replaces the default WordPress login/authorization system with one relying on an external server, such as Google, CAS, LDAP, or an OAuth2 provider. Finally, Authorizer lets you limit invalid login attempts to prevent bots from compromising your users’ accounts.
View or contribute to the plugin source on GitHub: <a href="https://github.com/uhm-coe/authorizer" rel="nofollow ugc">https://github.com/uhm-coe/authorizer</a>
Authorizer requires the following:
<ul>
<li>CAS server (2.x, 3.x, 4.x, 5.x, 6.x, or 7.x) or LDAP server (plugin needs the URL)</li>
<li>PHP extensions: php-ldap, php-curl, php-dom</li>
</ul>
Authorizer provides the following options:
<ul>
<li>Authentication: WordPress accounts; Google accounts; CAS accounts; LDAP accounts; OAuth2 accounts</li>
<li>Login Access: All authenticated users (all local and all external can log in); Only specific users (all local and approved external users can log in)</li>
<li>View Access: Everyone (open access); Only logged in users</li>
<li>Limit Login Attempts: Progressively increase the amount of time required between invalid login attempts.</li>
<li>Shortcode: Use the <code>[authorizer_login_form]</code> shortcode to embed a wp_login_form() outside of wp-login.php.</li>
</ul>

Authorizer

Integrates nicely with Google hosted domain/s. Couldn't be happier with how it works!

Integrates well with Google Logins

I've experimented this plugin on a multisite and everything works pretty well.

Works great even on a multisite setup

Authorizer limits login attempts, restricts access to specific users, and authenticates against external sources (OAuth2, Google, LDAP, or CAS).

gpspake

This plugin uses the phpCAS library to integrate CAS single sign on with WordPress.
<ul>
<li>Provide users with a familiar secure login on multiple WordPress sites without the need for additional expensive ssl certificates.</li>
<li>phpCAS configuration settings can be set in the plugin options </li>
<li>Login screen redirects to CAS url specified in options </li>
<li>New user accounts will be created for users who have not logged in to the site yet </li>
<li>User attributes returned by CAS can be used to populate new user account details such as email address and display name. </li>
<li>Service urls can be captured to redirect users to the same page on log in/out. (Logoutwithredirectservice must be enabled on CAS server for log out redirects to work.)</li>
</ul>
<h3>Special thanks</h3>
David R. Poindexter III and Indiana University – During the development of this plugin, IU-WPCAS was one of the only CAS plugins for WordPress and provided a good bit of inspiration. Clearly, our plugin’s name is completely original.
Todd Barber and Billy Barnet @ UTHSC for all of their patience, support and good advice

UTHSC WPCAS

Integrate Central Authentication Service (CAS) with WordPress

Authorizer vs UTHSC WPCAS