Extension:Auth remoteuser

Automatic REMOTE_USER Authentication extension automatically logs users using the REMOTE_USER environment variable.

There are several sites using this extension, including at least one using 1.13 and LDAP authentication, but proceed at your own risk! 

Save the file as /extensions/Auth_remoteuser.php

Then place the following two lines in your LocalSettings.php file:

Note: Using this extension sets $wgMinimalPasswordLength to zero

MediaWiki 1.9.4
To get this extension to work with MediaWiki 1.9.4, I made a couple of horrid hacks because of this error:

Internal error

&lt;password-change-forbidden&gt;

Backtrace:


 * 1) 0 /var/www/default/mediawiki-1.9.4/includes/User.php(1332): User::setPassword
 * 2) 1 /var/www/default/mediawiki-1.9.4/includes/SpecialUserlogin.php(311): User->setPassword('')
 * 3) 2 /var/www/default/mediawiki-1.9.4/includes/SpecialUserlogin.php(352): LoginForm->initUser(Object(User))
 * 4) 3 /var/www/default/mediawiki-1.9.4/extensions/Auth_remoteuser.php(77): LoginForm->authenticateUserData
 * 5) 4 /var/www/default/mediawiki-1.9.4/includes/Setup.php(219): Auth_remote_user_hook
 * 6) 5 /var/www/default/mediawiki-1.9.4/includes/Setup.php(219): call_user_func('Auth_remote_use...')
 * 7) 6 /var/www/default/mediawiki-1.9.4/includes/WebStart.php(90): require_once('/var/www/defaul...')
 * 8) 7 /var/www/default/mediawiki-1.9.4/index.php(4): require_once('/var/www/defaul...')
 * 9) 8 {main}

The horrid hacks:

Line 111 of ./extensions/Auth_remoteuser.php change the false from: to: Same for line 124: to: