Network Access: session security for NTLM SSP-based clients must be configured to require NTLMv2 session security and 128-bit encryption

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Microsoft has implemented a variety of security support providers for use with Remote Procedure Call (RPC) sessions. All of the options must be enabled to ensure the maximum security level.

Remediation

To fix this, configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Network security: Minimum session security for NTLM SSP based (including secure RPC) clients" to "Require NTLMv2 session security" and "Require 128-bit encryption" (all options selected).

STIG: Server: https://www.stigviewer.com/stig/windows_server_2019/2020-06-15/finding/V-93305



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