DOCUMENT:Q177670 10-AUG-2001 [winnt] TITLE :RRAS Does Not Enforce Strong Encryption for DUN Clients PRODUCT :Microsoft Windows NT PROD/VER:WinNT:4.0 OPER/SYS: KEYWORDS:kbinterop kbWinNT400sp4fix ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Server version 4.0 - Microsoft Routing and Remote Access Service Update for Windows NT Server version 4.0 - Microsoft Windows NT Server version 4.0, Terminal Server Edition ------------------------------------------------------------------------------- SYMPTOMS ======== When a Dial-Up Networking (DUN) client connects to a 40-bit or 128-bit Routing and Remote Access Server that is configured to "Require Data Encryption" or "Require Strong Data Encryption", the client is not disconnected if the selected data encryption negotiation fails to converge. The following error may be logged in Event Viewer in the System Log on the server after the client has successfully established its connection: Event ID : 20073 Source : Router Description: The following error occurred in the %protocol_name% module on port %port_name%. The PPP control protocol for this network protocol is not available on the server. NOTE: This error may also be logged after the installation of the Routing and Remote Access Service Hotfix Update 1.0 if "Require Strong Data Encryption" is enabled. 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, please see the following article in the Microsoft Knowledge Base: Q152734 How to Obtain the Latest Windows NT 4.0 Service Pack STATUS ====== Microsoft has confirmed this to be 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. Microsoft has confirmed this to be a problem in the Routing and Remote Access Service for Windows NT Server version 4.0. This problem has been corrected in the RRAS Upgrade for Windows NT Server 4.0 Hotfix Pack 3.0 or later. 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/ MORE INFORMATION ================ For additional information, please see the following articles in the Microsoft Knowledge Base: ARTICLE-ID: Q189594 TITLE : RRAS Upgrade for WinNT Server 4.0 Hotfix Pack 3.0 Release Notes ARTICLE-ID: Q169895 TITLE : Enabling 128-bit Encryption for Routing and Remote Access ARTICLE-ID: Q174474 TITLE : Installing RRAS Disables 128-bit RAS Encryption Additional query words: steelhead steel head rras ====================================================================== Keywords : kbinterop kbWinNT400sp4fix Technology : kbWinNTsearch kbWinNT400search kbWinNTSsearch kbWinNTS400search kbWinNTS400 kbNTTermServ400 kbNTTermServSearch kbAudDeveloper kbRRASNTSearch kbRRASNT400 Version : WinNT:4.0 Issue type : kbbug Solution Type : kbfix ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2001.