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WN11-00-000395 Windows 11 must not have portproxy enabled or in use.

DISA STIG library V2R11
All changes in this version
first version loaded CAT II

Maps to CM-7 via CCI-000381

Title

Windows 11 must not have portproxy enabled or in use.

Control

Check the registry key for existence of proxied ports: HKLM\SYSTEM\CurrentControlSet\Services\PortProxy\. If the key contains v4tov4\tcp\ or is populated v4tov4\tcp\, this is a finding. Run "netsh interface portproxy show all". If the command displays any results, this is a finding.

Discussion

Having portproxy enabled or configured in Windows 10 could allow a man-in-the-middle attack.

Related controls

CCI-000381

Fix

Contact the Administrator to run "netsh interface portproxy delete" with elevation. Remove any enabled portproxies that may be configured.