Event ID 6274 — NPS Accounting Request Message Processing

Applies To: Windows Server 2008

Network Policy Server (NPS) receives accounting request messages from configured RADIUS clients. Depending on the accounting configuration of the server running NPS, the accounting request will be logged in either a log file or a SQL Server database.

Event Details

Product: Windows Operating System
ID: 6274
Source: Microsoft-Windows-Security-Auditing
Version: 6.0
Message: Network Policy Server discarded the request for a user.

Contact the Network Policy Server administrator for more information.

%tSecurity ID:%t%t%t%1
%tAccount Name:%t%t%t%2
%tAccount Domain:%t%t%t%3
%tFully Qualified Account Name:%t%4

Client Machine:
%tSecurity ID:%t%t%t%5
%tAccount Name:%t%t%t%6
%tFully Qualified Account Name:%t%7
%tCalled Station Identifier:%t%t%9
%tCalling Station Identifier:%t%t%10

%tNAS IPv4 Address:%t%t%11
%tNAS IPv6 Address:%t%t%12
%tNAS Identifier:%t%t%t%13
%tNAS Port-Type:%t%t%t%14
%tNAS Port:%t%t%t%15

RADIUS Client:
%tClient Friendly Name:%t%t%16
%tClient IP Address:%t%t%t%17

Authentication Details:
%tProxy Policy Name:%t%t%18
%tNetwork Policy Name:%t%t%19
%tAuthentication Provider:%t%t%20
%tAuthentication Server:%t%t%21
%tAuthentication Type:%t%t%22
%tEAP Type:%t%t%t%23
%tAccount Session Identifier:%t%t%24
%tReason Code:%t%t%t%25


Reconfigure, upgrade, or replace the RADIUS client

This condition occurs when NPS discards accounting requests because the structure of the accounting request message that was sent by a RADIUS client does not comply with the RADIUS protocol.

To reconfigure, upgrade, or replace the RADIUS client:

  • Contact your RADIUS client vendor for configuration assistance or firmware updates. Many RADIUS client vendors provide updated firmware that allows the RADIUS client to send Accounting-Request messages that comply with the RADIUS protocol.
  • If your RADIUS client vendor cannot provide reconfiguration instructions or firmware that allows the RADIUS client to send RADIUS protocol-compliant messages, you must obtain and install a RADIUS protocol-compliant RADIUS client for use with NPS.


To verify that accounting request messages are being processed by NPS:

  1. On the server running NPS, use a network traffic diagnostic application to capture UDP network traffic.
  2. Attempt to connect to the network through the RADIUS client with an access client.
  3. Examine the capture to verify that NPS received and processed an accounting request message from the network access server.


NPS Accounting Request Message Processing

Network Policy Server Infrastructure