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https://support.microsoft.com/en-us/help/2793313/security-guidance-for-ntlmv1-and-lm-network-authentication
Jan 08, 2013 · All supported versions of the Windows operating system support NTLMv2. Windows NT 4.0 SP6a also supports NTLMv2. Therefore, there is a very small compatibility risk. Third-party legacy implementations or configurations may have to be evaluated for any interoperability issues.
https://support.symantec.com/us/en/article.HOWTO54161.html
To configure NTLM compatibility for Windows Vista and Windows 7. Click Start > All Programs > Accessories > Run and type secpol.msc in the Open box, and then click OK. Click Local Policies > Security Options > Network Security: LAN Manager authentication level. Click Send LM & NTLM - use NTLMv2 session security if negotiated. Click Apply.
https://docs.microsoft.com/en-us/windows/security/threat-protection/security-policy-settings/network-security-lan-manager-authentication-level
In Windows 7 and Windows Vista, this setting is undefined. In Windows Server 2008 R2 and later, this setting is configured to Send NTLMv2 responses only. Countermeasure. Configure the Network security: LAN Manager Authentication Level setting to Send NTLMv2 responses only. Microsoft and a number of independent organizations strongly recommend this level of authentication when all client computers support NTLMv2.
https://support.symantec.com/us/en/article.howto54187.html
To configure NTLMv2 compatibility for Windows XP . Click Start > Settings > Control Panel. Click the Performance and Maintenance category. Click Administrative Tools. Click Local Security Policy > Local Policies > Security Options > Network Security: LAN Manager authentication level. Click Send LM& NTLM - use NTLMv2 session security if negotiated. Click OK.
To use the local security settings to force Windows to use NTLMv2: Open the Local Security Policy console, using one of the following methods: From the Control Panel: Navigate to the Control Panel. Double-click , and then . Via search: Search for the secpol.msc application and launch it.
https://docs.microsoft.com/en-us/windows/win32/secauthn/microsoft-ntlm
Windows Challenge/Response (NTLM) is the authentication protocol used on networks that include systems running the Windows operating system and on stand-alone systems. The Microsoft Kerberos security package adds greater security than NTLM to systems on a network. Although Microsoft Kerberos is the protocol of choice, NTLM is still supported. NTLM must also be used for logon authentication …
https://support.microsoft.com/en-us/help/4090105/how-to-audit-domain-controller-use-of-ntlmv1-and-ntlmv2
May 07, 2018 · This article introduces the steps to test any application that is using NT LAN Manager (NTLM) version 1 on a Windows Server-based domain controller. Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method.
https://social.technet.microsoft.com/Forums/windows/en-US/02476acb-aa5f-4fcf-8079-4a697a065610/ntlmv2-secure-authentication-method
Feb 02, 2014 · I think it's because Microsoft's default new security policy is to use only NTLMv2 authentication, which Samba 2.x doesn't support. With Vista Business, the secpol.msc program allows you to change the security policy setting, but this program doesn't seem to exit in Vista Home or my new Windows 7.
https://en.wikipedia.org/wiki/NT_LAN_Manager
NTLM version 2 (NTLMv2), which was introduced in Windows NT 4.0 SP4 (and natively supported in Windows 2000), enhances NTLM security by hardening the protocol against many spoofing attacks, and adding the ability for a server to authenticate to the client. NTLMv2 sends two responses to an 8-byte server challenge.
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