MediaWiki knows groups that can be given certain privileges:
If editing shall be restricted to trusted users this is not possible.
Furthermore it is not possible to restrict reading to trusted users which might be necessary when using MediaWiki for sensitive information.
Two new user groups are introduced:
You can grant read authorization to anonymous users with:
$xyAllowAnonymousRead = true;
You can grant read authorization to logged on users with:
$xyAllowUserRead = true;
The ''Main Page'' is readable by any user, to allow creation of user accounts.