At 10:40 PM 2/2/00 +1100, Terry Collins wrote:
>Hello Sluggers
>
>Perhaps it has been a long day, but I have an NT wkstn (SP3) that is
>NOT seeing any samba share from three linux servers.
>
>It is not a tcpip/networking problem problem, but seems to be solely
>in NT. It just doesn't see any machine in network neighbourhhod. Has
>no problems seeing the novell server, but no samba stuff.
>
>Unfortunately it has to stay, but suggestions as to the aloofness are
>welcome.
For the benefit of those also in this position, courtesy of Mr Gates, et al.
Document Q166730 from Microsoft's Knowledgebase.
Unencrypted Passwords May Cause SP3 to Fail to Connect to SMB Servers
The information in this article applies to:
� Microsoft Windows NT Workstation version 4.0 with Service Pack 3
� Microsoft Windows NT Server version 4.0 with Service Pack 3
� Microsoft Windows NT Workstation version 4.0 with Service Pack 4
� Microsoft Windows NT Server version 4.0 with Service Pack 4
SYMPTOMS
After upgrading your Windows NT 4.0 computer to Service Pack 3 (SP3), you
are unable to connect to certain non-Microsoft Server Message Block (SMB)
servers and you may receive the following error message:
System error 1240 has occurred.
The account is not authorized to login from this station.
CAUSE
Some non-Microsoft SMB servers only support unencrypted (plain text)
password exchanges during authentication.
The SMB client redirector in Windows NT 4.0 Service Pack 3 and later
handles unencrypted passwords differently than previous versions of Windows
NT. Beginning with Windows NT 4.0 Service Pack 3, the SMB redirector does
not send an unencrypted password during authentication to an SMB server
unless you add a specific registry entry.
In previous versions, the client would automatically negotiate downward to
unencrypted (plain text) authentication if requested from the server.
RESOLUTION
Check with the vendor of the SMB server product to see if there is a way to
support encrypted password authentication, or if there is a newer version
of the product that adds this support.
Alternatively, to enable unencrypted (plain text) passwords for the SMB
client on Windows NT 4.0 Service Pack 3 and newer systems, modify the
registry in the following way:
WARNING: Enabling this will allow unencrypted (plain text) passwords to be
sent across the network when authenticating to an SMB server that requests
this option. This can lessen the overall security of an environment and
should only be done after careful consideration of the consequences of
plain text passwords in your specific environment.
WARNING: Using the registry editor incorrectly can cause serious, system-
wide problems that may require you to reinstall Windows NT. Microsoft
cannot guarantee that any problems resulting from the use of the registry
editor can be solved. Use this tool at your own risk.
Run Registry Editor (Regedt32.exe).
From the HKEY_LOCAL_MACHINE subtree, go to the following key:
\SYSTEM\CurrentControlSet\Services\Rdr\Parameters
Click Add Value on the Edit menu.
Add the following:
Value Name: EnablePlainTextPassword
Data Type: REG_DWORD
Data: 1
Click OK and then quit Registry Editor.
Shut down and restart Windows NT.
To enable unencrypted (plain text) passwords in an automated setup, modify
the registry in the following way:
WARNING: Using the registry editor incorrectly can cause serious, system-
wide problems that may require you to reinstall Windows NT. Microsoft
cannot guarantee that any problems resulting from the use of the registry
editor can be solved. Use this tool at your own risk.
Add the following line to the Product.Add.Reg section of the Update.inf file:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Rdr\Parameters,
"EnablePlainTextPassword", 0x10001, 1
Additional query words: 4.00 VAX
Keywords : kbnetwork NTSrvWkst
Version : WinNT:4.0
Platform : winnt
Issue type : kbinfo
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