ALH

2.3.0

Public/Get-ALHADSubnetInfo.ps1

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 <#PSScriptInfo
 
.VERSION 1.1.0
 
.GUID c993f4be-ac1d-4744-92e5-7fd55f58daa4
 
.AUTHOR Dieter Koch
 
.COMPANYNAME
 
.COPYRIGHT (c) 2021-2023 Dieter Koch
 
.TAGS
 
.LICENSEURI https://github.com/admins-little-helper/ALH/blob/main/LICENSE
 
.PROJECTURI https://github.com/admins-little-helper/ALH
 
.ICONURI
 
.EXTERNALMODULEDEPENDENCIES
 
.REQUIREDSCRIPTS
 
.EXTERNALSCRIPTDEPENDENCIES
 
.RELEASENOTES
1.0
- Initial release
 
1.1.0
- Cleaned up code
 
#>


<#
 
.DESCRIPTION
Contains function to get a sorted list of all AD Subnets for the domain the user running the cmdlet is member in.
#>


function Get-ALHADSubnetInfo {
    <#
    .SYNOPSIS
    Returns a sorted list of all AD Subnets for the domain the user running the cmdlet is member in.
 
    .DESCRIPTION
    Returns a sorted list of all AD Subnets for the domain the user running the cmdlet is member in.
 
    .EXAMPLE
    Get-ALHADDSSubnetInfo
 
    .INPUTS
    Nothing
 
    .OUTPUTS
    PSCustomObject
 
    .NOTES
    Author: Dieter Koch
    Email: diko@admins-little-helper.de
 
    .LINK
    https://github.com/admins-little-helper/ALH/blob/main/Help/Get-ALHADSubnetInfo.txt
    #>

    [CmdletBinding()]
    param ()

    $RequiredModules = "ActiveDirectory"

    foreach ($RequiredModule in $RequiredModules) {
        if (-not [bool](Get-Module -Name $RequiredModule)) {
            if (-not [bool](Get-Module -Name $RequiredModule -ListAvailable)) {
                Write-Warning -Message "Module $RequiredModule not found. Stopping function."
                break
            }

            Write-Verbose -Message "Importing $RequiredModule Module"
            Import-Module ActiveDirectory
        }
    }

    Write-Verbose -Message "Get a list of all domain controllers in the forest"
    $DcList = (Get-ADForest).Domains | `
            ForEach-Object { Get-ADDomainController -Discover -DomainName $_ } | `
                ForEach-Object { Get-ADDomainController -Server $_ -Filter * }

    Write-Verbose -Message "Get all replication subnets from Sites & Services"
    $Subnets = Get-ADReplicationSubnet -Filter * -Properties * | Select-Object Name, Site, Location, Description

    $ResultsArray = @()

    foreach ($Subnet in $Subnets) {
        $SiteName = ""

        If ($null -ne $Subnet.Site) { $SiteName = $Subnet.Site.Split(',')[0].Trim('CN=') }
        $DcInSite = $False

        If ($DcList.Site -Contains $SiteName) { $DcInSite = $True }

        $RA = New-Object PSObject
        $RA | Add-Member -type NoteProperty -Name "Subnet" -Value $Subnet.Name
        $RA | Add-Member -type NoteProperty -Name "SiteName" -Value $SiteName
        $RA | Add-Member -type NoteProperty -Name "DcInSite" -Value $DcInSite
        $RA | Add-Member -type NoteProperty -Name "SiteLoc" -Value $Subnet.Location
        $RA | Add-Member -type NoteProperty -Name "SiteDesc" -Value $Subnet.Description
        $ResultsArray += $RA
    }

    $ResultsArray | Sort-Object -Property SiteName, Subnet
}

#region EndOfScript
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# created with help of http://patorjk.com/software/taag/
#>
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