Microsoft Windows Server 2019
Windows Server 2019 setting Microsoft network server: Digitally sign communications (always) must be configured to Enabled
Description
The server message block (SMB) protocol provides the basis for many network operations. Digitally signed SMB packets aid in preventing man-in-the-middle attacks. If this policy is enabled, the SMB server will only communicate with an SMB client that performs SMB packet signing.Satisfies: SRG-OS-000423-GPOS-00187, SRG-OS-000424-GPOS-00188
Check
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\LanManServer\Parameters\Value Name: RequireSecuritySignatureValue Type: REG_DWORDValue: 0x00000001 (1)
Fix
Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Microsoft network server: Digitally sign communications (always)" to "Enabled".