Microsoft KB Archive/186905

= RADIUS Client Uses 100 Percent CPU on Invalid Response =

Article ID: 186905

Article Last Modified on 11/1/2006

-

APPLIES TO


 * Microsoft Windows NT Server 4.0, Terminal Server Edition
 * Microsoft Windows NT 4.0 Service Pack 3
 * Microsoft Routing and Remote Access Service Update for Windows NT Server 4.0

-



This article was previously published under Q186905





SYMPTOMS
When you use the Routing and Remote Access Service (RRAS) update with Remote Authentication Dial-In User Service (RADIUS)authentication and accounting, the MPROUTER process consumes 100 percent processor time.



CAUSE
The RADIUS server returned an invalid length field in a response packet.



RESOLUTION
To resolve this problem, obtain the latest service pack for Windows NT 4.0 or Windows NT Server 4.0, Terminal Server Edition. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

152734 How to Obtain the Latest Windows NT 4.0 Service Pack

Apply the Routing and Remote Access Hotfix Pack 3.0. For your convenience, the English version of this post-SP3 hotfix has been posted to the following Internet location. However, Microsoft recommends that you install Windows NT 4.0 Service Pack 4 to correct this problem.

ftp://ftp.microsoft.com/bussys/winnt/winnt-public/fixes/usa/nt40/hotfixes-postSP3/rras30-fix/

For additional information about the Routing and Remote Access Hotfix Pack 3.0, see the following article in the Microsoft Knowledge Base:

ARTICLE-ID: 189594

TITLE : RRAS Upgrade for WinNT Server 4.0 Hotfix Pack 3.0 Release Notes



STATUS
Microsoft has confirmed this to be a problem in Routing and Remote Access Update for Windows NT version 4.0. This problem was first corrected in Windows NT 4.0 Service Pack 4.0 and Windows NT Server 4.0, Terminal Server Edition Service Pack 4.

Additional query words: tight loop

Keywords: kbhotfixserver kbqfe kbbug kbfix kbqfe KB186905

-

[mailto:TECHNET@MICROSOFT.COM Send feedback to Microsoft]

© Microsoft Corporation. All rights reserved.