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A brief look at configuring minimum session security for NTLM SSP based server
Written by Titus Manohar, IT security team, ManageEngine • Updated on May 2026
This policy setting allows you to configure a client device to require the negotiation of 128-bit encryption or NTLMv2 session security. These values are dependent on the Network security: LAN Manager authentication level policy setting value. The policy setting can be configured to 'Require 128-bit encryption'. In this case the connection fails if strong encryption (128-bit) is not negotiated. The policy can also be configured to 'Require NTLMv2 session security' in which case the connection fails if the NTLMv2 protocol is not negotiated.
You can find this policy at Computer Configuration>Windows Settings>Security Settings>Local Policies>Security Options
Security concerns and remediation:
Network traffic that depends on NTLM Security Support Provider (NTLM SSP) could face vulnerabilities like exposure to an attacker who has penetrated the network and can lead to man-in-the-middle attacks.
Configuring all these values for this policy setting will help protect network traffic that uses the NTLM SSP from being accessed by a hacker who has entered the same network. Older client devices that do not support these security settings cannot communicate with the computers which have this policy.
About ADAudit Plus
ADAudit Plus is a real time change auditing software that helps keep your Active Directory, Azure AD, Windows file servers, NetApp filers, EMC file systems, Synology file systems, Windows member servers, and workstations secure and compliant. With ADAudit Plus, you can get visibility into:
- Authorized and unauthorized AD management changes
- User logons, logoffs, and account lockouts
- GPO changes
- Group attribute and membership changes
- OU changes
- Privileged access and permission changes
- Azure AD logons, and changes to roles, groups, and applications
- PowerShell scripts and modules
among other things.
There are more than 200 event-specific reports, and you can configure instant email alerts. You can also export the reports to XLS, HTML, PDF and CSV formats to assist in interpretation and forensics.