MAC - Effectively Control Access To Your Internal Websites (Mac OS X 10.3 Server)
Mac OS X Server's Web service allows you to set up areas of your website to require authentication. To do so, you first create a realm, which is a folder (and its subfolders) within your website's root folder. After you create the realm, you can specify which users and groups can access the realm. Each user and group you add to the realm can have either browse or authoring capabilities, but is required to authenticate before gaining access to the website.