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XCCDF
Microsoft Windows 11 Security Technical Implementation Guide
SRG-OS-000480-GPOS-00227
The LanMan authentication level must be set to send NTLMv2 response only, and to refuse LM and NTLM.
The LanMan authentication level must be set to send NTLMv2 response only, and to refuse LM and NTLM.
An XCCDF Rule
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The LanMan authentication level must be set to send NTLMv2 response only, and to refuse LM and NTLM.
High Severity
<VulnDiscussion>The Kerberos v5 authentication protocol is the default for authentication of users who are logging on to domain accounts. NTLM, which is less secure, is retained in later Windows versions for compatibility with clients and servers that are running earlier versions of Windows or applications that still use it. It is also used to authenticate logons to stand-alone computers that are running later versions.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>