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On versions of Mac OS X Tiger (10.4.9) and earlier, the version of Samba that comes with the OS does not support NTLMv2 authentication out of the box. Windows Vista by default only allows NTLMv2 authentication for SMB/CIFS shares.

To allow Vista to talk to your Mac shares, you must allow Vista to authenticate via NTLMv1:

If you have Windows Vista Home Basic/Premium:
Open the registry editor. Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Lsa. There will be a value called LmCompatibilityLevel. Set that to DWORD 1. Reboot and try to connect again.

(source: vista64.net forums)

If you have Windows Vista Enterprise, Business, or Ultimate:
Follow the instructions at http://www.builderau.com.au/blogs/codemonkeybusiness/viewblogpost.htm?p=339270746
The above registry editing will work, but this method is easier to accomplish.

If you have a newer version of Mac OS X that has Samba ≥ version 3.0.22:
Edit the file /etc/smb.conf and add the following line to the [global] section:
client ntlmv2 auth = yes
Restart Windows File Sharing and attempt to connect again.

You can use this with earlier versions of Samba 3.0, but there are some bugs to be wary of.

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by raw See Profile edited by rjackson See Profile
last modified: 2007-05-05 11:51:59