Private/Win/Set-UnattendedWindowsFirewallState.ps1

function Set-UnattendedWindowsFirewallState
{
    param (
        [Parameter(Mandatory = $true)]
        [boolean]$State
    )

    $setupNode = $script:un |
    Select-Xml -XPath '//un:settings[@pass = "specialize"]/un:component[@name = "Networking-MPSSVC-Svc"]' -Namespace $ns |
    Select-Object -ExpandProperty Node

    $WindowsFirewallStateNode = $script:un.CreateElement('DomainProfile_EnableFirewall')
    $WindowsFirewallStateNode.InnerText = [string]$State
    [Void]$setupNode.AppendChild($WindowsFirewallStateNode)

    $WindowsFirewallStateNode = $script:un.CreateElement('PrivateProfile_EnableFirewall')
    $WindowsFirewallStateNode.InnerText = [string]$State
    [Void]$setupNode.AppendChild($WindowsFirewallStateNode)

    $WindowsFirewallStateNode = $script:un.CreateElement('PublicProfile_EnableFirewall')
    $WindowsFirewallStateNode.InnerText = [string]$State
    [Void]$setupNode.AppendChild($WindowsFirewallStateNode)
}