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The Peer Name Resolution Protocol must not be installed.


Finding ID Version Rule ID IA Controls Severity
V-224852 WN16-00-000370 SV-224852r569186_rule Medium
Unnecessary services increase the attack surface of a system. Some of these services may not support required levels of authentication or encryption or may provide unauthorized access to the system.
Microsoft Windows Server 2016 Security Technical Implementation Guide 2021-09-29


Check Text ( C-26543r465458_chk )
Open "PowerShell".

Enter "Get-WindowsFeature | Where Name -eq PNRP".

If "Installed State" is "Installed", this is a finding.

An Installed State of "Available" or "Removed" is not a finding.
Fix Text (F-26531r465459_fix)
Uninstall the "Peer Name Resolution Protocol" feature.

Start "Server Manager".

Select the server with the feature.

Scroll down to "ROLES AND FEATURES" in the right pane.

Select "Remove Roles and Features" from the drop-down "TASKS" list.

Select the appropriate server on the "Server Selection" page and click "Next".

Deselect "Peer Name Resolution Protocol" on the "Features" page.

Click "Next" and "Remove" as prompted.