Thread:Project:Support desk/MediaWiki Security Settings/reply

Hi Tom,

MediaWiki was not written to handle situations where particular pages should be visible only for a particular group of users. While you can fiddle around to somewhat achieve this, there are many ways to circumvent such restrictions. The only thing you can trust is about prevent editing from users not in a particular group, but prevent viewing content is not well supported.

You can find how it works in Manual:Preventing access