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This paper discussed Windows 2000 Internet Authentication Service (IAS). IAS is the Microsoft implementation of a RADIUS server. IAS provides an industry standard method to authenticate, authorize, and provide accounting for any device acting as a RADIUS client. IAS can be used in a variety of scenarios including centralized authentication and accounting for an organization’s remote access infrastructure, outsourced corporate access using third-party dial-up service providers, and centralized authentication and accounting for an Internet service provider (ISP). IAS can scale to suit almost any organization’s authentication and accounting requirements using either faster computers or multiple computers using an IP load-balancing scheme.
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