Aaron Axelsen

LDAP authentication is configured on a site-wide (as opposed to per-blog) level, so only Network Admin accounts have access to the configuration to LDAP connection information.
Please make sure you have PHP compiled with LDAP support. This will show up as an LDAP section in your phpinfo() if it is correct.
Remember – all the code for the plugin was contributed by volunteers, and you can show your gratitude by giving back to the community!
<h3>How It Works</h3>
When enabled, this plugin can automatically create WordPress user accounts and blogs for LDAP-authenticated users. Assuming user credentials authenticate against the LDAP server, creating local accounts and blogs follows this 
algorithm:
Create a new WPMU User, with LDAP username and a randomly generated password. 
Some user information, such as first and last name, is extracted from the 
 information returned from the LDAP server. 
Actions for user creation and activation are triggered. 
The user’s domain / URL are created depending on plugin configuration (i.e., 
 VHost vs SubDir). 
If the option is set, a blog is created, with path and name based on the LDAP 
 username and the blog is activated with the user being Administrator, and 
 appropriate actions are triggered.
It should be noted that even though a random password is created for a user (for WPMU accounts), it is never displayed to the user. This is intentional so that there is no confusion as to which password should be used; it will always be using LDAP credentials. As a result, though, if ever LDAP is disabled or if the server is unavailable, users created with LDAP authentication will be unable to log in unless their passwords are reset.

WPMU Ldap Authentication

A plugin to override the core WordPress authentication method in order to use a LDAP server for authentication.  Currently only supported on MultiSite …

CoSign SSO is a WordPress plugin that provides several alternative authentication methods to WordPress, and it maybe easily extend to support more SSO login methods. CoSign v2 and CoSign v3 are the first two Single Sign-on(SSO) addins, that whay this plugin named. The other login method is just a by-product which provides LDAP authentication.
When this plugin is enabled, and the login method is set to SSO, then using a external CoSign single sign-on login service. When user click login, browser will redirect to remote login url, and will redirect back after successful logged in. If set login method to LDAP, login with the familiar login screen, but authentication backend changed to LDAP.
Whether using SSO or LDAP login method, LDAP options must provided to fetch user account information. If the logged in user account does not exists, create it on the fly by default.
<h3>Settings</h3>
The settings for CoSign SSO are extremely simple. But before you change the login method to ‘SSO’ or ‘LDAP’, you mast check options for cosign and ldap carefully. Wrong configrations will ban all users including yourself!
If you cannot login any more, don’t blame me. A trick may help you:
<pre><code>$ touch <PLUGIN_DIR>/cosign-sso/FALLBACK
</code></pre>
If the fallback file contains “ldap”, “cosign2”, or “cosign3”, it will fallback to the right login method.
After you correct the settings, not forgot to remove the FALLBACK file.
Notes for CoSign 3.x:
<ul>
<li>CoSign 3.x filter needs to add a “/cosign/valid” location as cosign handler.</li>
<li>If wordpress uses a permlink, which means the RewriteRule in .htaccess may conflict with the “/cosign/valid” handler.</li>
<li>You can hack wp-includes/rewrite.php, add “RewriteRule ^cosign/valid – [L]” right after “RewriteBase” directive.</li>
</ul>
<h3>Localization</h3>
This section describes how to localized, which means let cosign-sso speak in your language.
<ul>
<li>POT file : cosign-sso/languages/cosign_sso.pot</li>
<li>Copy pot file to your locale, such as cosign-sso/languages/cosign_sso-zh_CN.pot for Chinese.</li>
<li>Translate it using your favorate editor. lokalize and kbabel are recommended.</li>
<li>Convert po to mo using command: </li>
</ul>
<pre>
 $ cd plugins/cosign-sso/languages
 $ msgfmt cosign_sso-zh_CN.po -o cosign_sso-zh_CN.mo
</pre>
<h3>Known Issues</h3>
No known issues at this time.
If you find any bugs or want to request some additional features for future releases, please log them on the wordpress project of <a href="http://redmine.ossxp.com/" rel="nofollow ugc">homepage for our interest projects</a>

CoSign Single Signon

CoSign SSO is a WordPress plugin that provides several alternative authentication methods to WordPress, and it maybe easily extend to support more SSO …

WPMU Ldap Authentication vs CoSign Single Signon