2022年9月27日 · We have done this breaking down to 4 changes, Send NTLM responses only –Clients use NTLM authentication only and use NTLMv2 session security if the server supports it. Domain controllers accept LM, NTLM, and NTLMv2 authentication.

2024年3月16日 · In this article, we will look at how to disable the NTLMv1 and NTLMv2 protocols and switch to Kerberos in an Active Directory domain. How to Enable NTLM Authentication Audit Logging? The key NTLMv1 problems: and other vulnerabilities.

2017年4月19日 · LAN Manager authentication includes the LM, NTLM, and NTLMv2 variants, and it's the protocol that is used to authenticate all client devices running the Windows operating system when they perform the following operations: Send NTLMv2 responses only. Refuse LM. Send NTLMv2 responses only. Refuse LM & NTLM.

2023年5月11日 · Microsoft has introduced a group policy that allows admins to audit NTLM authentication in the Active Directory domain. In addition, it enables visibility into NTLM-based authentication requests to domain controllers. The Group Policy setting is the Network Security: Restrict NTLM: Audit NTLM authentication in this domain setting. It is found here:

2017年12月31日 · NTLM and NTLMv2 authentication is vulnerable to various malicious attacks, including SMB replay, man-in-the-middle attacks, and brute force attacks.

在 Group Policy 中，這些設定通常位於 `電腦設定\Windows 設定\安全性設定\本機原則\安全性選項`，其中包括以下選項 - 網路安全性: 限制 NTLM: 送往遠端伺服器的連出 NTLM 流量 - 網路安全性: 限制 NTLM: 稽核連入 NTLM 流量 - 網路安全性: 限制 NTLM: 連入 NTLM 流量 - [GCB要求]網路安全性: LAN Manager 驗證等級 - [GCB要求]網路安全性: NTLM SSP 為主的 (包含安全 RPC) 伺服端的最小工作階段安全性 - [GCB要求]網路安全性: NTLM SSP 為主的 (包含安全 RPC) 用戶端的 …

2019年2月6日 · NT LAN Manager (including LM, NTLM v1, v2, and NTLM2) is enabled and active in Server 2016 by default, as its still used for local logon (on non-domain controllers) and workgroup logon authentication in Server 2016. You can restrict and/or disable NTLM authentication via Group Policy.

2024年3月1日 · NTLMv2 (NT LAN Manager v2): The most secure protocol of the three, NTLMv2 offers better protection against various attacks compared to LM and NTLM. The LAN Manager Authentication Level setting allows you to choose which protocols your system will use or accept for authentication.

Learn how to configure a GPO to audit the NTLM logon success and failure on a computer running Windows in 5 minutes or less.

2006年8月20日 · To force systems to use NTLMv2 rather than NTLM and reject any computer that attempts lower-level authentication, you can open Group Policy Management Console (GPMC), select a Group Policy Object (GPO) that's applied to all the computers on your network, navigate to Computer ConfigurationWindowsSettingsSecurity SettingsLocal PoliciesSecurity ...