MD-5 CHAP Authentication Does Not Work with Windows NT 4.0 Service Pack 4 (225503)
The information in this article applies to:
- Microsoft Windows NT Server 4.0 Terminal Server Edition
- Microsoft Windows NT Workstation 4.0 SP4
- Microsoft Windows NT Server 4.0 SP4
This article was previously published under Q225503 SYMPTOMS
After you apply Windows NT 4.0 Service Pack 4 to your remote access server computer, CHAP-MD5 authentication cannot be used for incoming dial-up connections. Client computers that attempt to authenticate using CHAP-MD5 can no longer connect to the remote access server.
CAUSE
No valid CHAP challenge was being sent by the RAS computer.
RESOLUTION
To resolve this problem, obtain the latest service pack for Windows NT 4.0 or
the individual software update. For information on obtaining the
latest service pack, please go to:
For information on obtaining the individual software update, contact Microsoft
Product Support Services. For a complete list of Microsoft Product Support
Services phone numbers and information on support costs, please go to the
following address on the World Wide Web:
STATUSMicrosoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Windows NT Server version 4.0, Terminal Server Edition Service Pack 6.
| Modification Type: | Minor | Last Reviewed: | 9/23/2005 |
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| Keywords: | kbHotfixServer kbQFE kbbug kbfix kbQFE KB225503 |
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