Microsoft KB Archive/187940

= Input Filters over IPX WAN Routing May Fail to Filter Packets =

Article ID: 187940

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT Server 4.0, Terminal Server Edition
 * Microsoft Windows NT Server 4.0 Standard Edition

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This article was previously published under Q187940



SYMPTOMS
When input filters are set to deny packets coming into a computer running Windows NT Server 4.0 that is acting as a router, the Windows NT router may not properly filter out the packet types and may forward the packet to the other side of the router. Outbound filters on the computer running Windows NT Server work correctly and properly filter out packets.



CAUSE
IpxFwdInternalReceive detects that the packets should be dropped but does not communicate this to the IPX stack.



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



STATUS
Microsoft has confirmed that this is a problem in Windows NT 4.0 and Windows NT Server 4.0, Terminal Server Edition. 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: IPX/SPX nwlink nwlnk

Keywords: kbbug kbfix KB187940

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