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V-278211

CAT II (Medium)

The Windows Server 2025 setting Microsoft network client: Digitally sign communications (if server agrees) must be configured to Enabled.

Rule ID

SV-278211r1181339_rule

STIG

Microsoft Windows Server 2025 Security Technical Implementation Guide

Version

V1R1

CCIs

CCI-002418 CCI-002421

Discussion

The server message block (SMB) protocol provides the basis for many network operations. If this policy is enabled, the SMB client will request packet signing when communicating with an SMB server that is enabled or required to perform SMB packet signing. Satisfies: SRG-OS-000423-GPOS-00187, SRG-OS-000424-GPOS-00188

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\LanmanWorkstation\Parameters\

Value Name: EnableSecuritySignature

Value Type: REG_DWORD
Value: 0x00000001 (1)

Fix Text

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> Microsoft network client: Digitally sign communications (if server agrees) to "Enabled".