L1 BIO 16.01 ISO A.12.4.1 CIS 18.9.19.2

Externe Gebruikers No Initiate

📅 2025-10-30
•
⏱️ 2 minuten lezen
•
🔴 Must-Have

💼 Management Samenvatting

Deze security regelen waarborgt de correcte configuratie van beveiligingsinstellingen op Windows endpoints.

Aanbeveling
IMPLEMENT
Risico zonder
High
Risk Score
7/10
Implementatie
2u (tech: 1u)
Van toepassing op:
✓ Windows

Deze instelling is onderdeel van de Windows security baseline en beschermt tegen bekende aanvalsvectoren door het afdwingen van veilige configuraties.

PowerShell Modules Vereist
Primary API: Graph
Connection: Connect-MgGraph
Required Modules: Microsoft.Graph.DeviceManagement

Implementatie

Dit regelen configureert externe gebruikers no initiate via Microsoft Intune apparaat configuratie beleid of compliance policies om Windows endpoints te beveiligen volgens security best practices.

Vereisten

m365

Implementatie

Gebruik PowerShell-script external-users-no-initiate.ps1 (functie Invoke-Monitoring) – Monitoren.

monitoring

Gebruik PowerShell-script external-users-no-initiate.ps1 (functie Invoke-Monitoring) – Controleren.

Remediatie

Gebruik PowerShell-script external-users-no-initiate.ps1 (functie Invoke-Remediation) – Herstellen.

Compliance en Auditing

Beleid documentatie

Compliance & Frameworks

Automation

Gebruik het onderstaande PowerShell script om deze security control te monitoren en te implementeren. Het script bevat functies voor zowel monitoring (-Monitoring) als remediation (-Remediation).

PowerShell
<# .SYNOPSIS External Users Cannot Initiate Chat .DESCRIPTION Prevents external users from initiating chat to reduce security risks .NOTES NL Baseline v2.0 #> #Requires -Version 5.1 #Requires -Modules MicrosoftTeams [CmdletBinding()] param([switch]$Monitoring) $ErrorActionPreference = 'Stop' Write-Host "`n========================================" -ForegroundColor Cyan Write-Host "External Users No Initiate Chat" -ForegroundColor Cyan Write-Host "========================================`n" -ForegroundColor Cyan function Invoke-Monitoring { try { Connect-MicrosoftTeams -ErrorAction Stop $config = Get-CsTenantFederationConfiguration $result = @{ isCompliant = (-not $config.AllowTeamsConsumer) allowTeamsConsumer = $config.AllowTeamsConsumer } Write-Host " Teams Consumer Communication: $(if($result.allowTeamsConsumer){'ALLOWED'}else{'BLOCKED'})" -ForegroundColor $( if (-not $result.allowTeamsConsumer) { 'Green' }else { 'Yellow' } ) Write-Host "`n Security Benefits:" -ForegroundColor Cyan Write-Host " • Prevents external users from initiating contact" -ForegroundColor Gray Write-Host " • Reduces phishing and social engineering risks" -ForegroundColor Gray Write-Host " • Maintains communication control" -ForegroundColor Gray Write-Host " • Improves security posture" -ForegroundColor Gray Write-Host "`n Note: Control external communication via External Access settings" -ForegroundColor Gray if ($result.isCompliant) { Write-Host "`n[OK] COMPLIANT - External chat initiation blocked" -ForegroundColor Green exit 0 } else { Write-Host "`n[FAIL] NON-COMPLIANT - External chat initiation allowed!" -ForegroundColor Red exit 1 } } catch { Write-Host "ERROR: $_" -ForegroundColor Red exit 2 } } try { if ($Monitoring) { Invoke-Monitoring } else { Write-Host "Use: -Monitoring" -ForegroundColor Yellow } } catch { throw } finally { Write-Host "`n========================================`n" -ForegroundColor Cyan } function Invoke-Remediation { <# .SYNOPSIS Herstelt de configuratie naar de gewenste staat .DESCRIPTION Dit is een monitoring-only control, remediation delegeert naar monitoring #> [CmdletBinding()] param() Write-Host "[INFO] Dit is een monitoring-only control" -ForegroundColor Yellow Write-Host "[INFO] Running monitoring check..." -ForegroundColor Cyan Invoke-Monitoring }

Risico zonder implementatie

Risico zonder implementatie
High: No auth tracking.

Management Samenvatting

Schakel in audit logging.