[Samba] Problem with smbclient to Windows 2003 Server.

Jean-Baptiste Marchand jbm at hsc.fr
Mon May 5 11:07:04 GMT 2003

* Back Daniel <di0bada at chl.chalmers.se> [01/01/70 - 01:00]:


> So, W2K doesn’t need SMB-packets signatures and we have no problems, but we 
> want it to work with Windows 2003. What’s the difference between Windows 2000 
> and Windows 2003 when it comes to security signatures of SMB-packets? 

By default, a Windows Server 2003 requires signature of SMB packets (at
least, a Windows Server 2003 DC).

> Can we disable signatures in Windows 2003 Server or do we have to make
> some changes in Red Hat/Samba? Is ther another way to get around this
> problem?

Yes, you can look for the following security option

Microsoft network server: Digitally sign commnunications (always) :

and set it to Disabled, instead of Enabled.

This security option modifies the following registry value:

Key: HKLM\SYSTEM\CCS\Service\lanmanserver\parameters\
Value: RequireSecuritySignature
Content: 0 to disable, 1 to enable

If you don't want to reboot after that change, you can stop the srv.sys
driver and services that depend on it using the following command:

C:\>net stop srv

Then, you can restart it, as well as the services that depend on it
(in particular, netlogon)

C:\>net start srv 

Jean-Baptiste Marchand
Jean-Baptiste.Marchand at hsc.fr
Hervé Schauer Consultants

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