Use this information for diagnosing and resolving any issues that might arise when
configuring NTLM.
SkyVault Content Services supports NTLM v2
protocol, which is more secure than NTLM v1 protocol. However, NTLM v2 cannot be used with
pass-through authentication. You will have to switch to NTLM v1 if you want to use
pass-through authentication, where the log on request is passed to an Active Directory or
other server to validate the login credentials. For more information, see the Configuring pass-through topic.
To
authenticate using NTLM v1, set the following registry key on your client
machines:
[HKLM\SYSTEM\CurrentControlSet\Control\Lsa] "LmCompatibilityLevel"=dword:00000001
Issue:
Failure of NTLM logon on machines running Windows 7 or Internet Explorer 8.
Troubleshooting
This problem is most likely caused by enhanced security in Windows 7, Vista and Windows 2008. Previous versions of Windows (XP) would fall back to NTLM v1, if NTLM v2 failed.
- On Windows 7 clients, navigate 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 authentication
level.
By default, the value of Network Security: LAN Manager authentication level is set to Send NTLMv2 response only. Refuse LM & NTLM.
- Set the value of Network Security: LAN Manager authentication level to Send LM and NTLM - use NTLMv2 session security if negotiated.
This setting allows Windows 7 to use the more secure NTLM v2, if available, and fall
back to NTLM v1 for SkyVault Content Services. If
the machines are in a domain, it is possible to change this setting on all of them by using
the group policy editor on the domain controller.