"STOP 0x000000D1" When Passing Fragmented Packets Without NAT (293161)


The information in this article applies to:

  • Microsoft Internet Security and Acceleration Server 2000
This article was previously published under Q293161

SYMPTOMS

If the Network Address Translation (NAT) driver on an Internet Security and Acceleration (ISA) Server-based server is stopped and the data that is being sent outbound is larger than the Maximum Transmission Unit (MTU) setting, fragmented packets pass through ISA Server, which may cause the following error message on a blue screen:
STOP 0x000000D1 (0x0000010e, 0x00000002, 0x00000000, 0xbfee8c70) DRIVER_IRQL_NOT_LESS_OR_EQUAL error code.
When this occurs, the following Event log entry is generated:
Event Type: Information
Event Source: Save Dump
Event Category: None
Event ID: 1001
Date:
Time:
User: N/A
Computer:
Description:
The computer has rebooted from a bugcheck. The bugcheck was: 0x000000d1 (0x0000010e, 0x00000002, 0x00000000, 0xbfee8c70). Microsoft Windows 2000 [v15.2195]. A dump was saved in: %SystemRoot%\MEMORY.DMP.

CAUSE

The Mspfltex.sys module stops working correctly in such a scenario. The problem can occur when you are using the Firewall client or in the S-NAT configuration.

RESOLUTION

A supported fix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Apply it only to computers that are experiencing this specific problem. This fix may receive additional testing. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next ISA Server service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS

NOTE: In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The typical support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

The English version of this fix should have the following file attributes or later: 
   Date       Time      Version      Size    File name   
   ------------------------------------------------------
   7/01/2001  11:06:42  3.0.1200.61  41,904  Mspfltex.sys

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.

MORE INFORMATION

It is unusual for the NAT driver to stop without manual intervention. Some other service or problem may have caused the NAT driver to stop. For testing purposes, you can stop the NAT driver by using the following command:

net stop ipnat

The error message might also occur if IP routing (ICMP pass-through) is enabled and a ping (ICMP) packet that is larger than the MTU setting is sent to a remote host.
Modification Type:MajorLast Reviewed:4/7/2006
Keywords:kbQFE KBHotfixServer kbenv kbfix kbISAServ2000sp1fix kbprb KB293161
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