IIS 6.0 Authentication Methods
Internet Information Services (IIS) provides several authentication methods to control users' access to Web and FTP sites. The authentication is the process of requiring users to provide a valid Windows user account and password. An administrator can configure authentication at several levels, such as directory level in IIS, Web or FTP site level, or NTFS file level. If you are responsible for managing Web sites on your network, it is important that you not only fully understand these authentication methods individually, but also know the effect they will have when they are enabled in various combinations. Let's look at these authentication levels in more detail and see which one might be the best authentication level for you to use in your environment, and how you might be able to enable multiple authentication methods to manage user access.
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