> session_start();
>  if ((!empty($_SERVER['PHP_AUTH_USER']) && 
> !empty($_SERVER['REMOTE_USER'])) || $_COOKIE['fpwiki_en_UserID']) {
>         require_once("$IP/extensions/HttpAuthPlugin.php");
>         $wgAuth = new HttpAuthPlugin();
>         $wgHooks['UserLoadFromSession'][] = 
> array($wgAuth,'autoAuthenticate');
>  }
> 

This looks kind of strange. That if line is saying "if the user is
authenticated by the web server, or the user has a cookie set, enable the
plugin". I think that $_COOKIE['fpwiki_en_UserID'] part is wrong. The
cookies assigned by your wiki wouldn't likely be 'fpwiki_en_UserID'; Try:

        $_COOKIE[$wgDBserver . "UserID"]

Which, I think, is the default way MediaWiki sets cookies.

That said, I really don't even understand the point of the if statement or
the session_start() line. Why isn't the plugin doing this stuff for you?

> I then added the following lines to http.conf:
> <Location /w/Special:UserLogin>
> AuthType "basic"
> AuthName "wiki"
> AuthPAM_Enabled on
> AuthPAM_FallThrough Off
> SSLRequireSSL
> Require valid-user
> </Location>
> 

This looks fine.

> The result is that when users visit Special:UserLogin, they 
> get a pop-up screen and must authenticate using PAM.  They 
> can then see the Special:UserLogin screen and must login 
> again (which isn't compared to our external database).  This 
> isn't quite what I wanted.  I am new to Apache and web 
> administration.  Does anyone have any advice?
> 

I'm very much betting it's that cookie line...

V/r,

Ryan Lane
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