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With this plugin, you can ask users to authenticate before they can see your WordPress site. 
You can either use the WordPress logins to authenticate, or a given password. 
This plugin can be useful when your website is still under construction or in beta fase. 
No HTTP Authentication is used.

Basic Authentication

With this plugin, you can ask users to authenticate before they can see your Wordpress site.

mitcho (Michael Yoshitaka Erlewine)

Will Norris

Brian Haas

Junaid Ahmed

michaelryanmcneill

bshelton229

deric.crago

alhrath

Dan Dalpiaz

Jonathan Champ

This plugin is designed to support integrating your WordPress site into your existing identity management infrastructure using a <a href="https://incommon.org/software/shibboleth/" rel="nofollow ugc">Shibboleth</a> Service Provider.
WordPress can be configured so that all standard login requests will be sent to your configured Shibboleth Identity Provider or Discovery Service. Upon successful authentication, a new WordPress account will be automatically provisioned for the user if one does not already exist. User attributes (username, first name, last name, display name, nickname, and email address) can be synchronized with your enterprise’s system of record each time the user logs into WordPress.
Finally, the user’s role within WordPress can be automatically set (and continually updated) based on any attribute Shibboleth provides. For example, you may decide to give users with an eduPersonAffiliation value of faculty the WordPress role of editor, while the eduPersonAffiliation value of student maps to the WordPress role contributor. Or you may choose to limit access to WordPress altogether using a special eduPersonEntitlement value.
<h4>Contribute on GitHub</h4>
This plugin is actively maintained by <a href="https://profiles.wordpress.org/michaelryanmcneill" rel="nofollow ugc">michaelryanmcneill</a> and the WordPress community, <a href="https://github.com/michaelryanmcneill/shibboleth" rel="nofollow ugc">using GitHub</a>. Contributions are welcome, via pull request, <a href="https://github.com/michaelryanmcneill/shibboleth" rel="nofollow ugc">on GitHub</a>. Issues can be submitted <a href="https://github.com/michaelryanmcneill/shibboleth/issues" rel="nofollow ugc">on the issue tracker</a>.

Shibboleth

We had no trouble installing and configuring the plugin. When we ran into an issue, it was no trouble to interact with the plugin authors. 

This plugin just works

Allows WordPress to externalize user authentication and account creation to a Shibboleth Service Provider.

Basic Authentication vs Shibboleth