The Windows SMB client will be enabled to perform SMB packet signing when possible.

From Windows Server 2008 R2 Member Server Security Technical Implementation Guide

Part of SMB Client Packet Signing (if server agrees)

Associated with IA controls: ECSC-1

SV-32309r1_rule The Windows SMB client will be enabled to perform SMB packet signing when possible.

Vulnerability discussion

If this policy is enabled, it causes the Windows Server Message Block (SMB) client to perform SMB packet signing when communicating with an SMB server that is enabled or required to perform SMB packet signing. This policy is defined by default in Local Computer Policy, where it is enabled by default.

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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”.

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