System.Web.Security Namespace

Verifies that the remote user has NT permissions to access the file requested. This class cannot be inherited.

The FileAuthorizationModule provides authorization services against file system access-control lists ( ACLs ) .

When the mode attribute of the authentication configuration element is set to Windows so that the WindowsAuthenticationModule is being used for the application, the FileAuthorizationModule module ensures that the requesting user is allowed read or write access to the resource, depending on the request verb, before executing the request.

For more information, see the CheckFileAccessForUser method.

UrlAuthorizationModule Class   ASP.NET Authorization