SV-253365r1268251: Connections to non-domain networks when connected to a domain authenticated network must be blocked. | Microsoft Windows 11 STIG SCAP Benchmark

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Assessment Title

Rule Text

Connections to non-domain networks when connected to a domain authenticated network must be blocked.

Description

Discussion Text

Multiple network connections can provide additional attack vectors to a system and must be limited. When connected to a domain, communication must go through the domain connection.

How this relates to the STIG checklist: STIG vs SCAP benchmark.

IA Controls

NIST SP 800-53

Not mappedCCI-000366

References

DPMS Target Microsoft Windows 11 DISA DPMS Target Microsoft Windows 11 5471

SCC Automation Reference

The reconstructed evaluation script behind this rule's OVAL check(s) — every module a compound check combines, with this rule's own concrete values and DISA's SCC tool's real per-module mechanism curated from static teardown of SCC releases.

# Windows PowerShell
# Reconstructed from oval:mil.disa.stig.windows11:def:253365
# Connections to non-domain networks when connected to a domain authenticated network must be blocked.
# Per-module read mechanism curated from static teardown of DISA's SCC tool
# (SCAP Compliance Checker) -- see the SCC Automation Reference above.

# Verifies 'Prohibit connection to non-domain networks when connected to domain authenticated network' is set to 'Enabled'
# registry_object (registry_test)
function test_1 {
  return (((@{String='reg_sz';ExpandString='reg_expand_sz';Binary='reg_binary';DWord='reg_dword';MultiString='reg_multi_sz';QWord='reg_qword';None='reg_none'}[(Get-Item -Path 'Registry::HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WcmSvc\GroupPolicy\').GetValueKind('fBlockNonDomain').ToString()]) -eq 'reg_dword') -and (((Get-ItemProperty -Path 'Registry::HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WcmSvc\GroupPolicy\' -Name 'fBlockNonDomain' -ErrorAction SilentlyContinue) | Select-Object -ExpandProperty 'fBlockNonDomain') -eq 1))
}

if (test_1) {
  Write-Output "PASS"
} else {
  Write-Output "FAIL"
}

Assessment Script Powered by AISyntax-verified

A standalone PowerShell script to assess this control automatically. Review before running it in your environment.

Syntax-checked as valid PowerShell. Not executed here — running it for real needs the actual ms_windows_11 target this check assesses.

# OVAL Definition: oval:mil.disa.stig.windows11:def:253365
if ((Get-ItemProperty -Path "HKLM:\Software\Policies\Microsoft\Windows\WcmSvc\GroupPolicy\fBlockNonDomain" -ErrorAction SilentlyContinue).fBlockNonDomain -eq 1) { Write-Output "PASS"; Exit 0 } else { Write-Output "FAIL"; Exit 1 }

Remediation

Configure the policy value for Computer Configuration >> Administrative Templates >> Network >> Windows Connection Manager >> "Prohibit connection to non-domain networks when connected to domain authenticated network" to "Enabled".