L1 BIO 16.01 ISO A.12.4.1 CIS 18.9.19.2

Firewall Public State

📅 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 firewall public state via Microsoft Intune apparaat configuratie beleid of compliance policies om Windows endpoints te beveiligen volgens security best practices.

Vereisten

Microsoft Intune via device configuratiebeleidsregels

Implementatie

Gebruik PowerShell-script firewall-public-state.ps1 (functie Invoke-Monitoring) – Monitoren.

monitoring

Gebruik PowerShell-script firewall-public-state.ps1 (functie Invoke-Monitoring) – Controleren.

Remediatie

Gebruik PowerShell-script firewall-public-state.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 Intune Windows Firewall: Public State Check .DESCRIPTION CIS - Public firewall comprehensive state (kritisch voor publieke netwerken!). .NOTES Filename: firewall-public-state.ps1|Author: Nederlandse Baseline voor Veilige Cloud|Profile: Public|Expected: Enabled + Block Inbound #> #Requires -Version 5.1 #Requires -RunAsAdministrator [CmdletBinding()]param([switch]$WhatIf, [switch]$Monitoring, [switch]$Remediation, [switch]$Revert) $ErrorActionPreference = 'Stop'; $Profile = "Public" function Connect-RequiredServices { $p = New-Object Security.Principal.WindowsPrincipal([Security.Principal.WindowsIdentity]::GetCurrent()); return $p.IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator) } function Test-Compliance { $r = [PSCustomObject]@{ScriptName = "firewall-public-state.ps1"; PolicyName = "Firewall Public State"; IsCompliant = $false; CurrentValue = $null; Details = @() }; function Invoke-Revert { Write-Host "Revert via Intune" } try { $fw = Get-NetFirewallProfile -Name $Profile; if ($fw.Enabled -and $fw.DefaultInboundAction -eq 'Block' -and $fw.DefaultOutboundAction -eq 'Allow') { $r.IsCompliant = $true; $r.Details += "Public state OK" }else { $r.Details += "Enabled:$($fw.Enabled) In:$($fw.DefaultInboundAction) Out:$($fw.DefaultOutboundAction)" } }catch { $r.Details += "Error: $($_.Exception.Message)" }; return $r } function Invoke-Remediation { Set-NetFirewallProfile -Name $Profile -Enabled True -DefaultInboundAction Block -DefaultOutboundAction Allow; Write-Host "Public state configured" -ForegroundColor Green } function Invoke-Monitoring { $r = Test-Compliance; Write-Host "`n$($r.PolicyName): $(if($r.IsCompliant){'COMPLIANT'}else{'NON-COMPLIANT'})" -ForegroundColor $(if ($r.IsCompliant) { 'Green' }else { 'Red' }); return $r } function Invoke-Revert { Write-Host "Revert via Intune" } try { if (-not(Connect-RequiredServices)) { exit 1 }; if ($Monitoring) { $r = Invoke-Monitoring; exit $(if ($r.IsCompliant) { 0 }else { 1 }) }elseif ($Remediation) { if (-not $WhatIf) { Invoke-Remediation } }elseif ($Revert) { Invoke-Revert }else { $r = Test-Compliance; exit $(if ($r.IsCompliant) { 0 }else { 1 }) } }catch { Write-Error $_; exit 1 }

Risico zonder implementatie

Risico zonder implementatie
High: No auth tracking.

Management Samenvatting

Schakel in audit logging.