A new "Network Policy Server" Web page has been published at http://www.microsoft.com/technet/network/nps/default.mspx. This page contains links to resources that describe Network Policy Server (NPS), the Microsoft implementation of a Remote Authentication Dial-in User Service (RADIUS) server and proxy in Windows Server 2008 (now in beta testing). NPS is the replacement for the Internet Authentication Service (IAS), which is provided with Windows Server 2003.

You can also use the URL http://www.microsoft.com/nps.