The information in this article applies to:
SYMPTOMS
After receiving spoofed connection request (SYN) packets over TCP/IP, a
computer running Windows 95 may begin to operate slowly. After about one
minute, Windows returns to normal operation.
CAUSEThis behavior occurs due to "Land Attack." Land Attack sends SYN packets with the same source and destination IP addresses and the same source and destination ports to a host computer. This makes it appear as if the host computer sent the packets to itself. Windows 95 operates more slowly while the host computer tries to respond to itself. RESOLUTIONWithout WinSock 2.0 UpdateThis issue is resolved by the following updated file for Windows 95 and Windows 95 OEM Service Release 2 (OSR2) without the WinSock 2.0 update only:
To install this update, follow these steps:
Vtcpup11.exeFor more information about how to download files from the Microsoft Download Center, please visit the Download Center at the following Web address http://www.microsoft.com/downloads/search.aspand then click How to use the Microsoft Download Center. The following files are installed by Vtcpup11.exe:
With WinSock 2.0 UpdateThis issue is resolved by the following updated file for Windows 95 and Windows 95 OEM Service Release 2 with the Winsock 2 update only:
To install this update, follow these steps:
~ Vtcpup20.exe For more information about downloading files from the Microsoft Software Library, please see the following article in the Microsoft Knowledge Base: Q119591 How to Obtain Microsoft Support Files from Online Services The following files are installed by Vtcpup20.exe:
Identifying the Winsock 2.0 updateFor information about how to determine whether the Winsock 2.0 update has been installed an a computer running Windows 95, please see the following article in the Microsoft Knowledge Base:Q177719 Identifying Windows Sockets 2 Run-Time Components for Windows 95 STATUSMicrosoft has confirmed this to be a problem in Microsoft Windows 95 and OEM Service Release 2 (OSR2). An update to address this problem is now available, but is not fully regression tested and should be applied only to computers experiencing this specific problem. Unless you are severely impacted by this specific problem, Microsoft does not recommend implementing this update at this time. Contact Microsoft Technical Support for more information. MORE INFORMATIONFor additional information about this issue as it applies to Microsoft Windows NT, please see the following article in the Microsoft Knowledge Base: Q165005 Windows NT Slows Down Because of Land Attack For additional information about issues resolved by updates to this component, please see the following articles in the Microsoft Knowledge Base: Q170791 Windows 95 TCP Clients Run Out of Ports Q168747 Update to Windows 95 TCP/IP to Address Out-of-Band Issue Additional query words:
Keywords : kbnetwork osr2 win95 |
Last Reviewed: January 13, 2000 © 2000 Microsoft Corporation. All rights reserved. Terms of Use. |