IIS 4 0 Creating Configuring a Web Server - Part 2 

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Providers.
Set anonymous access to a site by using the
Internet Service Manager.
Set a known user access to a site by using the Internet Service Manager.
Set an access permission to a directory on a site by using the Internet Service Manager.
Set a user access control to a site by specifying an address.
Set permissions to restrict access to a
Web site by using the appropriate security
more...