Wikimedia Bugzilla is closed!

I want to prevent anonymous reading for our internal Wiki. 
As described in http://meta.wikimedia.org/wiki/Preventing_Access my
LocalSettings.php file looks like this:
#$wgGroupPermissions = array();
#$wgWhitelistEdit = true;
#$wgWhitelistRead = array ("Special:Userlogin", "Wikipedia:Help");
$wgGroupPermissions['*'    ]['createaccount']   = false;
$wgGroupPermissions['*'    ]['read']            = fasle;
$wgGroupPermissions['*'    ]['edit']            = false;

Now, when you surf to the wiki index.php site everything looks as expected. But
if you know a wiki word and type it behind the url index.php/known_wiki_word the
reading restrection got lost and the user can read the internal wiki.