Article ID: 301337
Article Last Modified on 5/7/2007
APPLIES TO
- Microsoft Windows 2000 Service Pack 2
- Microsoft Windows 2000 Advanced Server
- Microsoft Windows 2000 Service Pack 2
This article was previously published under Q301337
SYMPTOMS
After you install Windows 2000 Service Pack 2 (SP2) on one of your servers, clients may not be able to use that server for different programs, such as Terminal Services, File and Printer sharing, or Microsoft Exchange Server.
Client computers that experience these problems are typically running Microsoft Windows 95, Microsoft Windows 98 or Microsoft Windows Millennium Edition (Me) and are connecting to your network by using Virtual Private Networking (VPN), but may also include Windows 2000 or Microsoft Windows NT 4.0 clients depending upon your network configuration.
If you are using non-Microsoft VPN servers or any routers that are using Network Address Translation (NAT), you may also see these symptoms from client computers.
Your Windows 98 client may receive the following error message when you try to copy files to or from a file share on the remote Windows 2000 server:
CAUSE
Windows 2000 SP2 included a change that required computers on the same subnet to use the same MTU, as defined in RFC 1191. After you install Windows 2000 SP2, your server ignores any ICMP destination unreachable messages that instruct it to lower the MTU, if the request to lower the MTU comes from a computer that is on the same subnet.
If your VPN server is assigning IP addresses that are part of the local network, the VPN client and the file server on the LAN are on the same subnet. If your VPN server is not assigning IP addresses that are part of the local network, the computers are not on the same subnet, and this problem does not occur. This problem can also occur if you have clients that are behind a NAT router and servers on the other side of the router that use different MTUs.
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
The following file is available for download from the Microsoft Download Center:
![[GRAPHIC: Download]](/wiki/index.php?title=File:Download.gif){kind=small}
Release Date: January 14, 2002
For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591 How to Obtain Microsoft Support Files from Online Services
Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help to prevent any unauthorized changes to the file. The English version of this fix should have the following file attributes or later:
Date Time Version Size File name
---------------------------------------------------------
26-Sep-01 20:11:42 5.0.2195.3951 121,936 Afd.sys
11-Oct-01 15:07:12 5.0.2195.3952 106,256 Msafd.dll
27-Sep-01 13:06:14 5.0.2195.4429 312,688 Tcpip.sys
30-Jul-01 20:15:14 5.0.2195.3988 16,240 Tdi.sys
11-Oct-01 15:07:12 5.0.2195.3649 17,680 Wshtcpip.dll
NOTE: This hotfix needs to be installed on all Windows 2000 SP2 computers that are exhibiting the symptoms listed above. It is not necessary to put this hotfix on the Windows 2000 VPN server because it already uses an MTU that matches the VPN clients.
STATUS
Microsoft 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 2000 Service Pack 3.
Additional query words: kbNetworking pptp rras
Keywords: kberrmsg kbbug kbfix kbwin2000presp3fix kbqfe kbwin2000sp3fix kbenv kbnetwork kbhotfixserver KB301337
