SMB Logoff Command Is Not Sent When Session Is Disconnected (316740)


The information in this article applies to:

  • Microsoft Windows 2000 Server
  • Microsoft Windows 2000 Advanced Server
  • Microsoft Windows 2000 Professional
  • Microsoft Windows XP Professional
  • Microsoft Windows XP Home Edition
This article was previously published under Q316740

SYMPTOMS

Windows 2000 and Windows XP do not send an SMB Logoff & X command when an SMB session is disconnected from an SMB server that does not understand Microsoft Windows NT status codes. This includes certain UNIX servers such as Linux that is running Samba SMB Server, Microsoft Windows 98, Microsoft Lan Manager, and so on.

CAUSE

When you disconnect a mapped drive to a share on the server, the client sends a Tree Disconnect &X command to the server. If that is the last mapped drive to that server, this command is followed by a logoff &X command to clean up all sessions for that user. Windows 2000 and Windows XP clients do not send the logoff &X command to the SMB server if the server does not understand Windows NT status codes, even if the dialect that was negotiated is NT LM 0.12 (the highest version of dialect that is supported by Windows 2000 and Windows XP). This design change was made in Windows 2000 and Windows XP because many SMB servers that do not support Windows NT status codes cannot correctly handle session logoffs.

STATUS

This behavior is by design.

MORE INFORMATION

The user session is cleaned up when the transport session between the client and server is closed. For example, if you are using TCP/IP for the connection, Windows 2000 and Windows XP will close that TCP session with the server, ending the user session as well. Windows 2000 and Windows XP closes this transport session much sooner than earlier versions of Windows to prevent open user sessions to linger on the server.

REFERENCES

For additional information on this problem in Windows XP, click the article number below to view the article in the Microsoft Knowledge Base:

323582 Net3101 Error on OS/2 Server Because of SessionSetup SMB

Modification Type:MajorLast Reviewed:12/3/2003
Keywords:kbenv kbnetwork kbprb KB316740
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