Anonymous access, the most common web site access control method, allows anyone to visit the public areas of a web site while preventing unauthorized users from gaining access to a web server's critical administrative features and private information. Anonymous authentication gives users access to a web site without prompting them for a user name or password. When a user attempts to connect to a public web site, the web server assigns the user to the Windows user account called IUSR_computername, where computername is the name of the server on which IIS is running.

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