Microsoft Network Policy Server

Internet Authentication Service (IAS) was renamed Network Policy Server (NPS) starting with Windows Server 2008. The content of this guide applies to both IAS and NPS. Throughout the text, NPS is used to refer to all versions of the service, including the versions originally referred to as IAS.

Configuring NPS Logging

NPS logging is also called RADIUS accounting, and must be configured to your requirements whether NPS is used as a RADIUS server, proxy, NAP policy server, or any combination of the three configurations.

To configure NPS logging, you must configure the events logged and viewed with Event Viewer and determine other information you want to log. In addition, you must decide whether you want to log user authentication and accounting information to text log files stored on the local computer or to a SQL Server database on either the local computer or a remote computer.

Using the event logs in Event Viewer, you can monitor Network Policy Server (NPS) errors and other events that you configure NPS to record.

NPS records connection request failure events in the System and Security event logs by default. Connection request failure events consist of requests that are rejected or discarded by NPS. Other NPS authentication events are recorded in the Event Viewer system log on the basis of the settings that you specify in the NPS snap-in. Some events that might contain sensitive data are recorded in the Event Viewer security log.

The following information is from Microsoft Windows Server TechNet Library.  For complete information, see RADIUS Accounting > NPS Events and Event Viewer > Configure NPS Event Logging (http://technet.microsoft.com/en-us/library/cc731085(v=ws.10).

Use this procedure to configure Network Policy Server (NPS) to record connection request failure and success events in the Event Viewer system log.

Membership in Domain Admins, or equivalent, is the minimum required to complete this procedure.

To configure NPS event logging using the Windows interface:

  1. Open the Network Policy Server (NPS) snap-in.
  2. Right-click NPS (Local), and then click Properties.
  3. On the General tab, select each required option, and then click OK.