The system must be configured to require a strong session key.

From Windows Server 2012/2012 R2 Domain Controller Security Technical Implementation Guide

SV-52888r2_rule The system must be configured to require a strong session key.

Vulnerability discussion

A computer connecting to a domain controller will establish a secure channel. Requiring strong session keys enforces 128-bit encryption between systems.

Check content

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \System\CurrentControlSet\Services\Netlogon\Parameters\ Value Name: RequireStrongKey Value Type: REG_DWORD Value: 1 This setting may prevent a system from being joined to a domain if not configured consistently between systems.

Fix text

Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> "Domain member: Require strong (Windows 2000 or Later) session key" to "Enabled".

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