WIndows 10 Clients dropping network shares to 2008 Server ( Samba/SMB 2 )

Windows 10Recently we had a problem where network shares were dropping in and out on some windows 10 machines. We used pings to make sure network connectivity was not to blame which it wasn’t ( no pings dropped ) some people online where complaining about having to roll back drivers for network cards to older versions

I have seen this on Vista before , so we forced it to use a lower version of Samba : 

To access said setting go to the control panel in Windows 10 (or 7), in Category view click on the text “System and Security”, then click on the text “Administrative Tools”.

Now double click and open “Local Security Policy”.

In the Local Security Policy screen on the left navigation tree, expand the “Local Policies –> Security Options” then about 2/3rd’s the way down the list you’ll see a Policy called “Network Security: LAN Manager authentication level”. Double click and change the setting to be “Send LM & NTLM – use NTLMv2 session security if negotiated.”

Then just press OK and close all of the open windows and then try again


n the case of Windows 10 Home, Local Security Policy does not exist; therefore make the change in the registry (use regedit).
Value Type: REG_DWORD – Number (32 bit, hexadecimal)
Valid Range 0-5
Default: 0, Set to 1 (Use NTLMv2 session security if negotiated)
Description: This parameter specifies the type of authentication to be used.


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Tags: dropping network connection, LMCompatibilityLevel, network share, NTLMv2, samba, smb, Windows 10

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