LAN MANAGER AUTHENTICATION LEVEL- THE POLICY EXPERT

NTLM attacks are especially relevant to Active Directory environments. One of the most common attack scenarios is NTLM Relay, where the attacker compromises one machine and then spreads laterally to other machines by using NTLM authentication directed at the compromised server. The best way to cope with NTLM vulnerabilities is basically not to use NTLM, as there are better and safer authentication methods out there. But easier said than done, because most large and veteran infrastructures contain machines that can only use NTLM. Is this case, it is important to make sure they are configured in the most secure fashion possible.

POLICY DESCRIPTION:
LAN Manager (LM) is a family of early Microsoft client/server software that allows users to link personal computers together on a single network. Network capabilities include transparent file and print sharing, user security features, and network administration tools. In Active Directory domains, the Kerberos protocol is the default authentication protocol. However, if the Kerberos protocol is not negotiated for some reason, Active Directory will use LM, NTLM, or NTLMv2.

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