Organizations typically provide remote connection options to staff at their own sites. Information technology (IT) staff set up dedicated telephone numbers for this purpose and attach modems (or similar hardware) to a server that is directly connected to the intranet. The server runs specialized software to handle connection details, and it also authenticates the dial-up user as being an authorized staff member.
Windows 2000 includes Routing and Remote Access, which allows you to provide dial-up facilities for your users. If you want to centralize your user authentication, authorization, and accounting services in Windows 2000, you can use Remote Access or VPN by setting up an Internet Authentication Service (IAS) server. Figure 17.3 illustrates one possible configuration of these servers.
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