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CAS Authentication

Download phpCAS to a directory on your web server. Comment out lines 60 - 103 of CAS.php unless you plan to configure and use the advanced PGT features.
Upload cas-authentication.php to the wp-content/plugins/ directory of your wordpress installation.
Log in as administrator and activate the plugin. Go to the Options tab and configure the plugin. STAY LOGGED IN to your original administrator account. You won't be able to log back in once you log out.
Open a window in a different browser (i.e. Internet Explorer if you were using FireFox), or on another computer. Log in to your blog to make sure that it works.
In the first browser window, make the newly created CAS user the new administrator. You can log out now. (Alternately, you can change some entries in the wp_usermeta table to make a new user the admin)
Disable Options -> General -> Anyone can register (they won't be able to)

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