Microsoft KB Archive/259591

= Event Viewer Reports That IP Security Is Receiving Unencrypted Traffic =

Article ID: 259591

Article Last Modified on 2/21/2007

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APPLIES TO


 * Microsoft Windows 2000 Server
 * Microsoft Windows 2000 Advanced Server
 * Microsoft Windows 2000 Professional Edition

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This article was previously published under Q259591



SYMPTOMS
Event Viewer may report the following event:

Event ID: 4284

Source: IPSec

Received  packet(s) in the clear from   which should have been secured. This could be a temporary glitch; if it persists please stop and restart the IPSec Policy Agent service on this machine.



CAUSE
The IP Security (IPSec) driver is receiving broadcast packets from the TCP/IP driver. IPSec is only for unicast traffic and should not be receiving broadcast traffic. The broadcast traffic is not encrypted and causes the IPSec driver to log an event about the packet being in the clear instead of being secured.



RESOLUTION
To resolve this problem, obtain the latest service pack for Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

260910 How to Obtain the Latest Windows 2000 Service Pack



STATUS
Microsoft has confirmed that this is a problem in Microsoft Windows 2000. This problem was first corrected in Windows 2000 Service Pack 1.

Keywords: kbbug kberrmsg kbfix kbipsec kbqfe kbwin2000sp1fix KB259591

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