The Windows SMB server is not enabled to perform SMB packet signing when possible.

From Windows 2003 Member Server Security Technical Implementation Guide

Part of SMB Server Packet Signing (if client agrees)

Associated with IA controls: ECSC-1

SV-29025r1_rule The Windows SMB server is not enabled to perform SMB packet signing when possible.

Vulnerability discussion

If this policy is enabled, it causes the Windows Server Message Block (SMB) server to perform SMB packet signing.

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Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> “Microsoft Network Server: Digitally sign communications (if Client agrees)” to “Enabled”.

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