openSUSE and Windows samba share

By default, access from openSUSE or any Linux box,to a Windows Vista CIFS share is broken.
The cause is that Samba speaks NTLM while Vista speaks only NTLMv2.

Googling provided the solution, but it does not seems well known yet.

A workaround is to make Vista more flexible on client acceptation.

If you are running the Ultimate or Buisness version of Vista :

  • Run secpol.msc
  • Go to Local Policies / Security Options
  • Find Network Security : LAN Manager authentication level
  • Change the setting from Send NTLMv2 response only to Send LM & NTLM – use NTLMv2 session security if negotiated

If you are running the Home version, you will have to edit the registry manually :


If it doesn’t already exist, create a DWORD value named LmCompatibilityLevel and set its value to 1.

Or in smb.conf :
client ntlmv2 auth = yes

More ressources there.