... computers running Windows Server 2003, Windows XP, Windows 2000, Windows NT 4.0 with Service Pack 4 and later, Windows Millennium Edition, and Windows 98. VPN Protocols Windows Server 2003 includes ... can be used with a variety of Microsoft clients including Windows Server 2003, Windows XP, Windows 2000, Windows NT version 4.0, Windows Millennium Edition, and Windows 98. PPTP does not require ... full-featured RADIUS server (for Windows 2000 Server and Windows Server 2003) that is tightly integrated with Active Directory and the Routing and Remote Access service. IAS for Windows Server 2003 also...