Windows 11 must not have portproxy enabled or in use.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-257592 | WN11-00-000395 | SV-257592r991589_rule | CCI-000381 | medium |
| Description | ||||
| Having portproxy enabled or configured in Windows 10 could allow a man-in-the-middle attack. | ||||
| STIG | Date | |||
| Microsoft Windows 11 Security Technical Implementation Guide | 2025-05-15 | |||
Related Frameworks
3 paths across 3 frameworks
Related Frameworks
NIST 800-531 mapping
CM-7
1.00
- DISA · 2 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
NIST 800-1711 mapping
3.4.6
1.00
- DISA · 2 · disa_xccdf · related
- DISA · 2025-01-23 · disa_cci_list · equivalent
- NIST · Rev 2 (Feb 2020, errata Jan 2021) · nist_800_171_app_d · equivalent
CCI1 mapping
CCI-000381
1.00
- DISA · 2 · disa_xccdf · related
Details
Check Text (C-257592r991589_chk)
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.
Fix Text (F-61256r922046_fix)
Contact the Administrator to run "netsh interface portproxy delete" with elevation. Remove any enabled portproxies that may be configured.