Microsoft Knowledge Base Article 299970 contains the following summary:
This is a step-by-step guide to using Windows NTFS security to protect Web pages that are running on Internet
Information Server (IIS) version 4.0 or 5.0. To protect your pages, you put the pages in a separate folder
and then apply permissions to that folder.
Note that this article does not outline the best practices for using FrontPage and the FrontPage Server Extensions. For additional information on best practices using FrontPage and the FrontPage Server Extensions, click the article number below to view the article in the Microsoft Knowledge Base:
216705 How to Set Permissions on a FrontPage Web on IIS