topic Re: Windows 7 Client and CIFS in Alfresco Archive

Windows 7 Client and CIFS

jsonnabend — Mon, 26 Sep 2011 21:29:22 GMT

I am in the middle of transitioning my law practice to Alfresco. Alfresco is installed and running an an XP-SP2 server. CIFS is configured and running. I can access my Alfresco files via Windows Explorer on my XP clients. I have one Windows 7 client, however, and I can't access Alfresco via CIFS

Re: Windows 7 Client and CIFS

resplin — Mon, 26 Sep 2011 23:30:12 GMT

Are you trying to use NTLM to authenticate?

There is increased default security in Windows 7 (and Vista and Windows2008) that will only negotiate NTLMv2, whereas Alfresco only understands NTLMv1. Previous versions of Windows (XP) would drop back to NTLMv1 if NTLMv2 failed.

* On Windows 7, go to Control Panel->Administrative Tools->Local Security Policy.

* In the left pane, navigate to Security Settings->Local Policies->Security Options.

* In the right pane, find "Network Security: LAN Manager authenication level".

* By default, it's set to "Send NTLMv2 response only. Refuse LM & NTLM". Try setting it to "Send LM and NTLM - use NTLMv2 session security if negotiated".

This will allow Windows 7 to use the more secure NTLMv2 when available, but drop down to NTLMv1 for Alfresco.

Re: Windows 7 Client and CIFS

jsonnabend — Tue, 27 Sep 2011 12:33:13 GMT

I'm using Wn7 Home, so I'm going to have to edit the registry myself. Is that level "2" I need to set LmCompatibilityLevel to?

Thanks again for the help. It's really appreciated.

- Jeff

Re: Windows 7 Client and CIFS

resplin — Tue, 27 Sep 2011 18:17:41 GMT

Most of the advice I see online suggests a value of 1, though I think any value besides 0 will work.

The only official documentation I see is for Windows Server 2000:
http://technet.microsoft.com/en-us/library/cc960646.aspx

If the registry key does not exist, then you should create it as a DWORD.

Good luck. Hopefully it will help.