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Network Policy and Access Services (NPAS) [1] is a component of Windows Server 2008. It replaces the Internet Authentication Service (IAS) from Windows Server 2003 . NPAS helps you safeguard the health and security of a network.
Network Access Protection (NAP) is a Microsoft technology for controlling network access of a computer, based on its health. It was first included in Windows Vista and Windows Server 2008 and backported to Windows XP Service Pack 3. With NAP, system administrators of an organization can define policies for system health requirements. [1]
The server is a Windows Service that stores its Group Policy Objects in an archive located on the same computer or a network share. The client is a snap-in to the Group Policy Management Console, and connects to the AGPM server.
In Windows Server 2008, Network Policy Server (NPS) replaces the Internet Authentication Service (IAS). NPS performs all of the functions of IAS in Windows Server 2003 for VPN and 802.1X-based wireless and wired connections and performs health evaluation and the granting of either unlimited or limited access for Network Access Protection clients.
A conforming client is given a Health Certificate, which it then uses to access protected resources on the network. A Network Policy Server, running Windows Server 2008 acts as health policy server and clients need to use Windows XP SP3 or later. A VPN server, RADIUS server or DHCP server can also act as the health policy server.
Once the updates are installed, the computer is granted access to the network. However, Windows Vista can only be a NAP client, i.e., a client computer which connects to a NAP enabled network. Health policy and verification servers have to be running Windows Server 2008.
The domain controller is particularly needed in Microsoft environments when using Microsoft's Internet Authentication Service (IAS) or Network Policy Server (NPS) software to provide RADIUS services from the Authentication Server. [3] Here is a list of authenticated users as displayed in Linksys LGS528P Switch.
Active Directory (AD) is a directory service developed by Microsoft for Windows domain networks. Windows Server operating systems include it as a set of processes and services. [1] [2] Originally, only centralized domain management used Active Directory.