Windows Server 2003 RRAS integrates routing with remote access into a single service. Remote users can connect to a Windows Server 2003 RRAS server to gain access to resources on the server or the network. Users can authenticate against the server's local accounts, against domain accounts, or against a RADIUS server. Windows Server 2003 includes the Internet Authentication Service, which you can use to configure a Windows Server 2003 computer as a RADIUS server, providing full authentication and accounting services. Windows Server 2003 supports several authentication methods offering varying degrees of security for both Windows and RADIUS authentication.

Virtual Private Networking support in RRAS enables remote clients to establish a secure connection to a Windows Server 2003 or its network through a public network such as the Internet. In addition to supporting PPTP, Windows Server 2003 RRAS also adds support for L2TP, which provides additional security over PPTP. Demand-dial router connections can also use PPTP and L2TP, making Windows Server 2003 RRAS a good solution for establishing secure network-to-network connections over the Internet.

Dial-up networking in Windows Server 2003 enables all versions of the operating system to function as a remote access client. While RAS dial-out is more prevalent on workstations, the same capabilities are available in Windows Server 2003. You can create dial-up connections to private networks, the Internet, or individual computers.

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