DnsStig.psm1

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Function Set-DnsServerStig {
    <#
  .SYNOPSIS
   Implements all STIGs contained in this module within the specified forest.
 
  .DESCRIPTION
   The Set-DnsServerStig cmdlet implements all of the STIGs in this module.
 
  .PARAMETER Forest
   The DNS Forest to configure.
 
  .PARAMETER RemoveProhibitedRecords
   Option to remove found prohibited records of type HINFO, RP, TXT, and LOC.
 
  .PARAMETER Credential
   The credential to use, requires Enterprise Admin rights.
 
        .EXAMPLE
   PS C:\>Set-DnsServerStig
 
         Implements all STIGs contained in this module within the specified forest, but does not removed prohibited record types.
 
  .EXAMPLE
   PS C:\>Set-DnsServerStig -RemoveProhibitedRecords
 
   Implements all STIG settings contained in this module and removes prohibited record types.
  
  .INPUTS
   System.String
 
  .OUTPUTS
   None
 
  .NOTES
   AUTHOR: Michael Haken
   LAST UPDATE: 2/28/2016    
 #>

    Param(
        [Parameter(Position=0,ValueFromPipeline=$true)]
        [string]$Forest = [System.String]::Empty,

        [Parameter()]
        [switch]$RemoveProhibitedRecords = $false,

        [Parameter()]
        [ValidateNotNull()]
        [System.Management.Automation.PSCredential]
        [System.Management.Automation.Credential()]
        $Credential = [System.Management.Automation.PSCredential]::Empty  
    )

    Begin {
    }

    Process
    {
        if (!(Test-IsEnterpriseAdmin -Credential $Credential))
        {
            Write-Error "The cmdlet must be run with Enterprise Admin credentials."
            Exit 1
        }

        Write-Host "Starting DNS STIG"

        if ($RemoveProhibitedRecords)
        {
            Remove-DnsServerProhibitedRecords -Forest $Forest -Credential $Credential
        }
        else
        {
            Get-DnsServerProhibitedRecords -Forest $Forest -Credential $Credential | ForEach-Object {
                Write-Warning ($_.Record | Out-String)
            }
        }

        $IPv6Servers = Get-DnsServersRunningIPv6 -Forest $Forest -Credential $Credential 
        Write-Warning -Message "These servers are running IPv6 ensure this is required. $($IPv6Servers | FL | Out-String)"
        

        Get-InactiveDnsServers -Forest $Forest | ForEach-Object {
            Write-Warning "Inactive server: $_"
        }

        Set-DnsServerZoneSecureUpdates -Forest $Forest -Credential $Credential
        Set-DnsServerDisableRootHints -Forest $Forest -Credential $Credential
        Set-DnsServerRecursionAndForwarders -Forest $Forest -Credential $Credential
        Set-DnsServerCryptoFolderPermissions -Forest $Forest -Credential $Credential
        Set-DnsServerZoneTransfers -Forest $Forest -Credential $Credential
        Set-DnsServerLogPermissions -Forest $Forest -Credential $Credential
        Set-DnsServerLogging -Forest $Forest -Credential $Credential
        Set-DnsServerVersionQuery -Forest $Forest -Credential $Credential

        Remove-DnsServerZoneIPv6LinkLocalAddresses -Forest $Forest -Credential $Credential
    }

    End {}
}

Function Remove-DnsServerProhibitedRecords {
    <#
  .SYNOPSIS
   The HINFO, RP, TXT and LOC RR types must not be used in the zone SOA.
 
  .DESCRIPTION
   The Remove-DnsServerProhibitedRecords cmdlet gets and then removes all prohibited records from each zone in the forest.
 
  .PARAMETER Forest
   The DNS Forest to configure.
 
  .PARAMETER Credential
   The credential to use, requires Enterprise Admin rights.
 
        .EXAMPLE
   PS C:\>Remove-DnsServerProhibitedRecords
 
         Removes all of the prohibited records in the current user forest.
 
  .INPUTS
   System.String
 
  .OUTPUTS
   None
 
  .NOTES
   AUTHOR: Michael Haken
   LAST UPDATE: 2/28/2016
 
  .FUNCTIONALITY
   STIG
    Microsoft Windows 2012 Server DNS V1R2
   STIG ID
    WDNS-SI-000004
   Rule ID
    SV-73169r1
   Vuln ID
    V-58739
   Severity
    CAT II        
 #>


    Param(
        [Parameter(Position=0,ValueFromPipeline=$true)]
        [string]$Forest = [System.String]::Empty,

        [Parameter(Position=1)]
        [ValidateNotNull()]
        [System.Management.Automation.PSCredential]
        [System.Management.Automation.Credential()]
        $Credential = [System.Management.Automation.PSCredential]::Empty 
    )

    Begin {    
    }

    Process
    {
        
        if (!(Test-IsEnterpriseAdmin -Credential $Credential))
        {
            Write-Error "The cmdlet must be run with Enterprise Admin credentials."
            Exit 1
        }

        Write-Host "Removing DNS Server Prohibited Entries."

        Get-DnsServerProhibitedRecords -Forest $Forest -Credential $Credential | ForEach-Object {
            $Record = ($_.Record | Out-String)
            Write-Warning "Removing record $Record" 

            try
            {
                $Server = Resolve-DnsName -Name $_.ZoneName -ErrorAction Stop | Select-Object -ExpandProperty PrimaryServer -ErrorAction SilentlyContinue
                
                if ([System.String]::IsNullOrEmpty($Server)) {
                    Write-Verbose -Message "PrimaryServer attribute was null, using the zone name for the server."
                    $Server = $_.ZoneName
                }

                Remove-DnsServerResourceRecord -ZoneName $_.ZoneName -ComputerName $Server -InputObject $_.Record -Force -Confirm:$false
            }
            catch [Exception]
            {
                Write-Warning "Error removing record $Record`: $($_.ToString())"
            }
        }

        Write-Host "Removing prohibited entries complete."
    }

    End {        
    }
}

Function Get-DnsServerProhibitedRecords {
    <#
  .SYNOPSIS
   The HINFO, RP, TXT and LOC RR types must not be used in the zone SOA.
 
  .DESCRIPTION
   The Get-DnsServerProhibitedRecords cmdlet gets all prohibited records from each zone in the forest.
 
  .PARAMETER Forest
   The DNS Forest to search.
 
  .PARAMETER Credential
   The credential to use, requires Enterprise Admin rights.
 
        .EXAMPLE
   PS C:\>Get-DnsServerProhibitedRecords
 
         Gets all of the prohibited records in the current user forest.
 
  .INPUTS
   System.String
 
  .OUTPUTS
   PSObject[]
 
  .NOTES
   AUTHOR: Michael Haken
   LAST UPDATE: 2/28/2016
 
  .FUNCTIONALITY
   STIG
    Microsoft Windows 2012 Server DNS V1R2
   STIG ID
    WDNS-SI-000004
   Rule ID
    SV-73169r1
   Vuln ID
    V-58739
   Severity
    CAT II    
 #>


    Param(
        [Parameter(Position=0, ValueFromPipeline=$true)]
        [string]$Forest = [System.String]::Empty,

        [Parameter()]
        [ValidateNotNull()]
        [System.Management.Automation.PSCredential]
        [System.Management.Automation.Credential()]
        $Credential = [System.Management.Automation.PSCredential]::Empty 
    )

    Begin {        
    }

    Process
    {
        Write-Host "Getting DNS Server prohibited entries."

        $BadRecords = @()

        Get-ForestDnsZones -ZoneType All -LookupType Forward -Forest $Forest -Credential $Credential | ForEach-Object {
            
            try
            {
                Write-Host "Getting entries for zone $($_.ZoneName)"
                $Zone = $_.ZoneName
                $Server = Resolve-DnsName -Name $_.ZoneName -ErrorAction Stop | Select-Object -ExpandProperty PrimaryServer -ErrorAction SilentlyContinue
                
                if ([System.String]::IsNullOrEmpty($Server)) {
                    Write-Verbose -Message "PrimaryServer attribute was null, using the zone name for the server."
                    $Server = $_.ZoneName
                }

                $Records = @(Get-DnsServerResourceRecord -ComputerName $Server -ZoneName $_.ZoneName | Where-Object {$_.RecordType -in @("Hinfo","RP","TXT","LOC")})

                if ($Records.Count -gt 0)
                {
                    foreach ($Record in $Records)
                    {
                        $BadRecords += @{Record=($Record);ZoneName=$_.ZoneName}
                    }
                }
            }
            catch [Exception]
            {
                Write-Warning "Error getting resource records for $Zone : $($_.ToString())"
            }
        }

        Write-Output -InputObject $BadRecords
    }

    End {
    }
}

Function Get-DnsServersRunningIPv6 {
    <#
  .SYNOPSIS
   When IPv6 protocol is installed, the server must also be configured to answer for IPv6 AAAA records.
 
  .DESCRIPTION
   The Get-DnsServersRunningIPv6 checks each DNS server in the forest to see if it has IPv6 enabled. If it does, but does not host AAAA records, it is returned as part of an array.
 
  .PARAMETER Forest
   The DNS Forest to test.
 
  .PARAMETER Credential
   The credential to use, requires Enterprise Admin rights.
 
        .EXAMPLE
   PS C:\>Get-DnsServersRunningIPv6
 
         Gets all of the DNS servers in the forest running IPv6 and not hosting AAAA records.
 
  .INPUTS
   System.String
 
  .OUTPUTS
   PSObject[]
 
  .NOTES
   AUTHOR: Michael Haken
   LAST UPDATE: 2/28/2016
  
  .FUNCTIONALITY
   STIG
    Microsoft Windows 2012 Server DNS V1R2
   STIG ID
    WDNS-CM-000028
   Rule ID
    SV-73057r1
   Vuln ID
    V-58627
   Severity
    CAT II        
 #>


    Param(
        [Parameter(Position=0,ValueFromPipeline=$true)]
        [string]$Forest = [System.String]::Empty,

        [Parameter()]
        [ValidateNotNull()]
        [System.Management.Automation.PSCredential]
        [System.Management.Automation.Credential()]
        $Credential = [System.Management.Automation.PSCredential]::Empty 
    )

    Begin {        
    }

    Process 
    {
        Write-Host "Getting DNS Servers running IPv6 and not hosting AAAA records."

        #0xFFFFFFFF - IPv6 Disabled On All Interfaces
        #0xFFFFFFFE - IPv6 Enabled only on tunnel interfaces
        #0xFFFFFFEF - IPv6 Disabled On Tunnel Interfaces, Enabled On All Others
        #0xFFFFFFEE - IPv6 Disabled On Loopback Interface, Enabled On All Others
        #0xFFFFFFDF - IPv6 Disabled, Prefer IPv6 over IpV4
        #0xFFFFFFDE - IPv6 Enabled Only On Tunnel Interfaces, Prefer IPv6 of IPv4
        #0xFFFFFFCF - IPv6 Enabled On All Non Tunnel Interfaces, Prefer IPv6 over IPv4
        #0xFFFFFFCE - IPv6 Disabled On Loopback Interface, Prefer IPv6 over IPv4

        #0x000000FF - IPv6 Disabled On All Interfaces
        #0x00000020 - IPv6 Prefer IPv4 over IPv6 by changing entries in prefix policy table = 100000
        #0x00000010 - IPv6 Disabled on LAN and PPP interfaces = 010000
        #0x00000008 - Disable Teredo = 001000
        #0x00000004 - Disable ISATAP = 000100
        #0x00000002 - Disable 6to4 = 000010
        #0x00000001 - IPv6 Disabled on Tunnel Interfaces including ISATAP, 6to4 and Teredo = 000001

        $DnsServers = Get-ForestDnsServers -Forest $Forest -Credential $Credential
        $Zones = Get-ForestDnsZones -Forest $Forest -LookupType Forward -Credential $Credential
        $BadZones = @()

        foreach ($Server in $DnsServers) 
        {
            $RegPropertyExists = Invoke-Command -ComputerName $Server -ScriptBlock ${function:Test-RegistryKeyProperty} -ArgumentList "HKLM:\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters","DisabledComponents" -Credential $Credential

            if ($RegPropertyExists)
            {
                $State = Invoke-Command -ComputerName $Server -ScriptBlock {Get-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters" -Name DisabledComponents} -Credential $Credential
                $DisabledValues = @([System.Convert]::ToString(0xFFFFFFFF, 16), [System.Convert]::ToString(0xFFFFFFFE, 16), [System.Convert]::ToString(0x00000011, 16))
            }

            #If IPv6 isn't disabled on the entire system check each individual adapter
            if (-not $RegPropertyExists -or (-not $DisabledValues.Contains([System.Convert]::ToString($State.DisabledComponents, 16))))
            {
                #Will return the number of network adapters with IPv6 Binding enabled
                $Adapters = @(Invoke-Command -ComputerName $Server -ScriptBlock {Get-NetAdapter | Where-Object{ (Get-NetAdapterBinding -InterfaceDESCRIPTION $_.InterfaceDESCRIPTION -ErrorAction SilentlyContinue | Where-Object {$_.ComponentID -eq "ms_tcpip6" -and $_.Enabled -eq $true})}} -Credential $Credential)
                
                if ($Adapters.Count -gt 0)
                {
                    Get-SpecificServerDnsZones -ComputerName $Server -LookupType Forward | ForEach-Object {
                        if (@(Get-DnsServerResourceRecord -ComputerName $Server -RRType AAAA -ZoneName $_.ZoneName).Count -eq 0)
                        {
                            $BadZones += @{ComputerName = $Server;ZoneName=$_.ZoneName;Adapters=$Adapters}
                        }
                    }
                }
            }
        }

        
        if ($BadZones.Count -gt 0)
        {
            Write-Warning -Message "Found servers without AAAA records that have IPv6 enabled."
        }
        
        Write-Output -InputObject $BadZones
    }

    End {
    }
}

Function Set-DnsServerNotifySecondaryServers {
    <#
  .SYNOPSIS
   The Windows 2012 DNS Server must use DNS Notify to prevent denial of service through increase in workload.
 
  .DESCRIPTION
   The Set-DnsServerNotifySecondaryServers cmdlet ensures the Notify secondary servers is enabled for any DNS zone that allows zone transfers.
 
  .PARAMETER Forest
   The DNS Forest to configure.
 
  .PARAMETER Credential
   The credential to use, requires Enterprise Admin rights.
 
        .EXAMPLE
   PS C:\>Set-DnsServerNotifySecondaryServers
 
         Ensures Notify is enabled for any DNS servers allowing zone transfers to secondaries.
 
  .INPUTS
   System.String
 
  .OUTPUTS
   None
 
  .NOTES
   AUTHOR: Michael Haken
   LAST UPDATE: 12/8/2015
 
  .FUNCTIONALITY
   STIG
    Microsoft Windows 2012 Server DNS V1R2
   STIG ID
    WDNS-SC-000027
   Rule ID
    SV-73129r1
   Vuln ID
    V-58699
   Severity
    CAT II    
 #>


    Param(
        [Parameter(Position=0,ValueFromPipeline=$true)]
        [string]$Forest = [System.String]::Empty,

        [Parameter()]
        [ValidateNotNull()]
        [System.Management.Automation.PSCredential]
        [System.Management.Automation.Credential()]
        $Credential = [System.Management.Automation.PSCredential]::Empty 
    )

    Begin {
    }

    Process
    {
        if (!(Test-IsEnterpriseAdmin -Credential $Credential))
        {
            Write-Error "The cmdlet must be run with Enterprise Admin credentials."
            Exit 1
        }

        Write-Host "Setting secondary server notification settings."

        $Servers = Get-ForestDnsServers -Forest $Forest -Credential $Credential

        foreach ($Server in $Servers)
        {
            Get-SpecificServerDnsZones -ComputerName $Server -ZoneType Primary -Credential $Credential | ForEach-Object {
                if ($_.SecureSecondaries -ne "NoTransfer")
                {
                    Set-DnsServerPrimaryZone -Name $_.ZoneName -ComputerName $Server -Notify Notify
                }
            }
        }

        Write-Host "Completed setting secondary server notification settings."
    }

    End {    
    }
}

Function Remove-DnsServerWINSForwardLookup {
    <#
  .SYNOPSIS
   WINS lookups must be disabled on the Windows 2012 DNS Server.
 
  .DESCRIPTION
   The Remove-DnsServerWINSForwardLookup disabled WINS forward lookup on each DNS server in the forest.
 
  .PARAMETER Forest
   The DNS Forest to configure.
 
  .PARAMETER Credential
   The credential to use, requires Enterprise Admin rights.
 
        .EXAMPLE
   PS C:\>Remove-DnsServerWINSForwardLookup
 
         Disables WINS lookups on all DNS servers in the forest.
 
  .INPUTS
   System.String
 
  .OUTPUTS
   None
 
  .NOTES
   AUTHOR: Michael Haken
   LAST UPDATE: 2/28/2016
 
  .FUNCTIONALITY
   STIG
    Microsoft Windows 2012 Server DNS V1R2
   STIG ID
    WDNS-SC-000006
   Rule ID
    SV-73091r1
   Vuln ID
    V-58661
   Severity
    CAT II    
 #>


    Param(
        [Parameter(Position=0,ValueFromPipeline=$true)]
        [string]$Forest = [System.String]::Empty,

        [Parameter()]
        [ValidateNotNull()]
        [System.Management.Automation.PSCredential]
        [System.Management.Automation.Credential()]
        $Credential = [System.Management.Automation.PSCredential]::Empty 
    )

    Begin {        
    }

    Process
    {
        if (!(Test-IsEnterpriseAdmin -Credential $Credential))
        {
            Write-Error "The cmdlet must be run with Enterprise Admin credentials."
            Exit 1
        }

        Write-Host "Setting WINS server settings."

        $Servers = Get-ForestDnsServers -Forest $Forest

        foreach ($Server in $Servers)
        {
            Get-SpecificServerDnsZones -ComputerName $Server -ZoneType Primary -LookupType Forward | ForEach-Object {
                #TODO: Set WINS Setting
            }
        }

        Write-Host "Completed WINS server settings."
    }

    End {    
    }
}

Function Set-DnsServerCryptoFolderPermissions {
    <#
  .SYNOPSIS
   The Windows 2012 DNS Server must be configured to enforce authorized access to the corresponding private key.
 
  .DESCRIPTION
   The Set-DnsServerCryptoFolderPermissions sets %ALLUSERSPROFILE%\Microsoft\Crypto folder, subfolders, and files to Full Control for SYSTEM and Administrators and removes all other privileges.
   The owner for the folder, subfolders, and files is also set to BUILTIN\Administrators.
 
  .PARAMETER Forest
   The DNS Forest to configure.
 
  .PARAMETER Credential
   The credential to use, requires Enterprise Admin rights.
   
        .EXAMPLE
   PS C:\>Set-DnsServerCryptoFolderPermissions
 
         Sets The permissions and owner for the crypto directory.
 
  .INPUTS
   System.String
 
  .OUTPUTS
   None
 
  .NOTES
   AUTHOR: Michael Haken
   LAST UPDATE: 2/28/2016
 
  .FUNCTIONALITY
   STIG
    Microsoft Windows 2012 Server DNS V1R2
   STIG ID
    WDNS-IA-000006
    WDNS-IA-000007
    WDNS-IA-000008
   Rule ID
    SV-73071r1
    SV-73073r1
    SV-73075r1
   Vuln ID
    V-58641
    V-58643
    V-58645
   Severity
    CAT II
#>


    Param(
        [Parameter(Position=0,ValueFromPipeline=$true)]
        [string]$Forest = [System.String]::Empty,

        [Parameter()]
        [ValidateNotNull()]
        [System.Management.Automation.PSCredential]
        [System.Management.Automation.Credential()]
        $Credential = [System.Management.Automation.PSCredential]::Empty 
    )
    
    Begin {
    }

    Process
    {
        if (!(Test-IsEnterpriseAdmin -Credential $Credential))
        {
            Write-Error "The cmdlet must be run with Enterprise Admin credentials."
            Exit 1
        }

        Write-Host "Setting Dns Server crypto folder owner and permissions."

        $Servers = Get-ForestDnsServers -Forest $Forest -Credential $Credential
        $Path = "$env:ALLUSERSPROFILE\Microsoft\Crypto"
        [System.Security.AccessControl.FileSystemAccessRule[]]$Rules = New-CryptoFolderAccessRuleSet

        foreach ($Server in $Servers)
        {
            Write-Host "Setting file permissions on $Server"

            $ServerPath = "\\$Server\" + $Path.Replace(":\","$\")
            Set-FileSecurity -Path $ServerPath -AccessRules $Rules -ReplaceAll -ForceChildInheritance
            Write-Host "Setting owner of $ServerPath on $Server"

            $SB ={
                ${$Function:Set-Owner}
                Set-Owner -Path $args[0] -Account $args[1] -Recurse:$args[2] -Confirm:$false
            }

            Invoke-Command -ComputerName $Server -Scriptblock $SB -ArgumentList @($Path,"BUILTIN\Administrators",$true)
        }

        Write-Host "Completed setting crypto folder owner and permissions."
    }

    End {    
    }
}

Function Set-DnsServerLogPermissions {
    <#
  .SYNOPSIS
   The Windows 2012 DNS Server logging criteria must only be configured by the ISSM or individuals appointed by the ISSM.
 
  .DESCRIPTION
   The cmdlet assigns specific access permissions for the DNS server logs The command must be run with Enterprise Admin credentials.
 
  .PARAMETER Forest
   The Forest in which to configure DNS servers.
 
  .PARAMETER Credential
   The credential to use, requires Enterprise Admin rights.
 
        .EXAMPLE
   PS C:\>Set-DnsServerLogPermissions
 
         Sets the c:\windows\system32\winevt folder to the default permissions and forces inheritance on all log files.
 
  .INPUTS
   System.String
 
  .OUTPUTS
   None
 
  .NOTES
   AUTHOR: Michael Haken
   LAST UPDATE: 2/28/2016
 
  .FUNCTIONALITY
   STIG
    Microsoft Windows 2012 Server DNS V1R2
   STIG ID
    WDNS-AU-000007
   Rule ID
    SV-72983r1
   Vuln ID
    V-58553
   Severity
    CAT II    
 #>


    Param(
        [Parameter(Position=0,ValueFromPipeline=$true)]
        [string]$Forest = [System.String]::Empty,

        [Parameter()]
        [ValidateNotNull()]
        [System.Management.Automation.PSCredential]
        [System.Management.Automation.Credential()]
        $Credential = [System.Management.Automation.PSCredential]::Empty 
    )
    
    Begin {
    }

    Process
    {
        if (!(Test-IsEnterpriseAdmin -Credential $Credential))
        {
            Write-Error "The cmdlet must be run with Enterprise Admin credentials."
            Exit 1
        }

        Write-Host "Setting Dns Server log permissions."

        $Servers = Get-ForestDnsServers -Forest $Forest -Credential $Credential
        $Path = "$env:SYSTEMROOT\System32\Winevt\Logs"
        $Rules = New-EventLogAccessRuleSet

        foreach ($Server in $Servers)
        {
            $ServerPath = "\\$Server\" + $Path.Replace(":\","$\")
            Set-FileSecurity -Path $ServerPath -AccessRules $Rules -ReplaceAll -ForceChildInheritance
        }

        Write-Host "Completed setting Dns Server log permissions."
    }

    End {    
    }
}

Function Set-DnsServerZoneTransfers {
    <#
  .SYNOPSIS
   The Windows DNS primary server must only send zone transfers to a specific list of secondary name servers.
 
  .DESCRIPTION
   The Set-DnsServerZoneTransfers cmdlet checks each DNS server in the forest to see if it has zone transfers enabled. If it does and are allowed "To any server", then the setting is changed to "Only to servers on the Name Servers tab".
 
  .PARAMETER Forest
   The DNS Forest to configure.
 
  .PARAMETER Credential
   The credential to use, requires Enterprise Admin rights.
 
        .EXAMPLE
   PS C:\>Set-DnsServerZoneTransfers
 
         Sets all DNS servers in the forest that have zone transfers enabled to any server to only servers on the Name Servers tab.
 
  .INPUTS
   System.String
 
  .OUTPUTS
   None
 
  .NOTES
   AUTHOR: Michael Haken
   LAST UPDATE: 2/28/2016
 
  .FUNCTIONALITY
   STIG
    Microsoft Windows 2012 Server DNS V1R2
   STIG ID
    WDNS-IA-000004
   Rule ID
    SV-73067r1
   Vuln ID
    V-58637
   Severity
    CAT II        
 #>


    Param(
        [Parameter(Position=0,ValueFromPipeline=$true)]
        [string]$Forest = [System.String]::Empty,

        [Parameter()]
        [ValidateNotNull()]
        [System.Management.Automation.PSCredential]
        [System.Management.Automation.Credential()]
        $Credential = [System.Management.Automation.PSCredential]::Empty 
    )

    Begin {
    }

    Process
    {
        if (!(Test-IsEnterpriseAdmin -Credential $Credential))
        {
            Write-Error "The cmdlet must be run with Enterprise Admin credentials."
            Exit 1
        }
        
        Write-Host "Setting DNS Server Zone Transfer settings."

        $Servers = Get-ForestDnsServers -Forest $Forest -Credential $Credential

        foreach ($Server in $Servers)
        {
            Get-SpecificServerDnsZones -ComputerName $Server -ZoneType Primary | ForEach-Object {
                if ($_.SecureSecondaries -eq "TransferAnyServer")
                {
                    Write-Warning "DNS Server $Server was set to transfer to any server, fixing..."
                    Set-DnsServerPrimaryZone -Name $_.ZoneName -ComputerName $Server -SecureSecondaries TransferToZoneNameServer
                    Write-Host "Done fixing $Server."
                }
            }
        }

        Write-Host "Completed setting DNS Server zone transfer settings"
    }

    End {    
    }
}

Function Remove-DnsServerZoneIPv6LinkLocalAddresses {
    <#
  .SYNOPSIS
   Non-routable IPv6 link-local scope addresses must not be configured in any zone.
 
  .DESCRIPTION
   The Remove-DnsServerZoneIPv6LinkLocalAddresses cmdlet gets all AAAA records in each zone and removes any link-local scope addresses.
 
  .PARAMETER Forest
   The DNS Forest to configure.
 
  .PARAMETER Credential
   The credential to use, requires Enterprise Admin rights.
 
        .EXAMPLE
   PS C:\>Remove-DnsServerZoneIPv6LinkLocalAddresses
          
   Removes all IPv6 link-local addresses from all DNS Zones
 
  .INPUTS
   System.String
 
  .OUTPUTS
   None
 
  .NOTES
   AUTHOR: Michael Haken
   LAST UPDATE: 2/28/2016
 
  .FUNCTIONALITY
   STIG
    Microsoft Windows 2012 Server DNS V1R2
   STIG ID
    WDNS-CM-000026
   Rule ID
    SV-73053r1
   Vuln ID
    V-58623
   Severity
    CAT II    
 #>


    Param(
        [Parameter(Position=0,ValueFromPipeline=$true)]
        [string]$Forest = [System.String]::Empty,

        [Parameter()]
        [ValidateNotNull()]
        [System.Management.Automation.PSCredential]
        [System.Management.Automation.Credential()]
        $Credential = [System.Management.Automation.PSCredential]::Empty 
    )

    Begin {
    }

    Process
    {
        if (!(Test-IsEnterpriseAdmin -Credential $Credential))
        {
            Write-Error "The cmdlet must be run with Enterprise Admin credentials."
            Exit 1
        }

        Write-Host "Removing IPv6 link local addresses from DNS."

        $Zones = @()

        Get-ForestDNSServers -Forest $Forest -Credential $Credential | ForEach-Object {
            $Zones += Get-DnsServerZone -ComputerName $_ -WarningAction SilentlyContinue | Where-Object {$_.IsReverseLookupZone -eq $false}
        }

        $Zones | Group-Object -Property ZoneName | ForEach-Object {
            $Zone = $_.Name
            Write-Verbose -Message "Processing zone $Zone"

            try
            {
                $Server = Resolve-DnsName -Name $Zone -ErrorAction Stop | Select-Object -ExpandProperty PrimaryServer -ErrorAction SilentlyContinue
                
                if ([System.String]::IsNullOrEmpty($Server)) {
                    Write-Verbose -Message "PrimaryServer attribute was null, using the zone name for the server."
                    $Server = $Zone
                }

                $RemovedRecords = Get-DnsServerResourceRecord -ZoneName $Zone -RRType AAAA -ComputerName $Server | Where-Object {$_.RecordData -match "^FE[89AB].*$"} | Remove-DnsServerResourceRecord -ComputerName $Zone -ZoneName $Zone -Force -Confirm:$false -PassThru
                
                if ($RemovedRecords.Count -gt 0)
                {
                    Write-Warning -Message "Removed the following records on $Server for zone $Zone`:"
                    Write-Warning -Message $RemovedRecords
                }
                else
                {
                    Write-Verbose -Message "No records to remove on $Server for zone $Zone."
                }
            }
            catch [Exception]
            {
                Write-Warning -Message "Could not get records for zone: $Zone`: $($_.ToString())"
            }
        }

        Write-Host "Completed removing IPv6 link local addresses."
    }

    End {        
    }
}

Function Get-InactiveDnsServers {
    <#
  .SYNOPSIS
   The Windows 2012 DNS Servers zone files must have NS records that point to active name servers authoritative for the domain specified in that record.
 
  .DESCRIPTION
   The Get-InactiveDnsServers cmdlet gets all NS records for a forest and then tries to resolve the NS record hostname on that NS server. Any non-active DNS servers are returned.
 
  .PARAMETER Forest
   The DNS Forest to test against.
  
        .EXAMPLE
   PS C:\>Get-InactiveDnsServers
 
         Returns a list of any non-active DNS servers in the forest.
 
  .INPUTS
   System.String
 
  .OUTPUTS
   System.String[]
 
  .NOTES
   AUTHOR: Michael Haken
   LAST UPDATE: 2/28/2016
 
  .FUNCTIONALITY
   STIG
    Microsoft Windows 2012 Server DNS V1R2
   STIG ID
    WDNS-CM-000010
   Rule ID
    SV-73023r1
   Vuln ID
    V-58593
   Severity
    CAT I        
 #>


    Param(
        [Parameter(Position=0,ValueFromPipeline=$true)]
        [string]$Forest = [System.String]::Empty
    )

    Begin {    
    }

    Process
    {
        $InactiveServers = @()
        Write-Host "Getting all inactive DNS servers."

        Get-ForestDnsServers -Forest $Forest | ForEach-Object {
            $Server = $_
            try
            {
                Resolve-DnsName -Name $_ -Server $_ -ErrorAction Stop | Out-Null
            }
            catch [Exception]
            {
                $InactiveServers += $Server
            }
        }

        Write-Output -InputObject $InactiveServers
    }

    End {    
    }
}

Function Set-DnsServerDisableRootHints {
    <#
  .SYNOPSIS
   Forwarders on an authoritative Windows 2012 DNS Server, if enabled for external resolution, must only forward to either an internal, non-AD-integrated DNS server or to the DoD Enterprise Recursive Services (ERS).
 
  .DESCRIPTION
   The Set-DnsServerDisableRootHints cmdlet removes all root hints and disables using root hints on each DNS server in the forest. The command must be run with Enterprise Admin credentials.
 
  .PARAMETER Forest
   The DNS Forest to set the root hints settings on.
 
  .PARAMETER Credential
   The credential to use, requires Enterprise Admin rights.
 
        .EXAMPLE
   PS C:\>Set-DnsServerDisableRootHints
 
         Disables root hints on all servers and removes root hints on all servers.
 
  .INPUTS
   System.String
 
  .OUTPUTS
   None
 
  .NOTES
   AUTHOR: Michael Haken
   LAST UPDATE: 2/28/2016
 
  .FUNCTIONALITY
   STIG
    Microsoft Windows 2012 Server DNS V1R2
   STIG ID
    WDNS-CM-000004
    WDNS-CM-000022
   Rule ID
    SV-73011r1
    SV-73045r1
   Vuln ID
    V-58581
    V-58615
   Severity
    CAT II    
 #>


    Param(
        [Parameter(Position=0,ValueFromPipeline=$true)]
        [string]$Forest = [System.String]::Empty,

        [Parameter()]
        [ValidateNotNull()]
        [System.Management.Automation.PSCredential]
        [System.Management.Automation.Credential()]
        $Credential = [System.Management.Automation.PSCredential]::Empty 
    )

    Begin {
    }

    Process
    {
        if (!(Test-IsEnterpriseAdmin -Credential $Credential))
        {
            Write-Error "The cmdlet must be run with Enterprise Admin credentials."
            Exit 1
        }

        Write-Host "Disabling all DNS server root hints."

        $Servers = Get-ForestDnsServers -Forest $Forest -Credential $Credential

        foreach ($Server in $Servers)
        {
            Get-DnsServerRootHint -ComputerName $Server | Remove-DnsServerRootHint -ComputerName $Server -Force -Confirm:$false
            Invoke-Command -ComputerName $Server -ScriptBlock {Set-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Services\DNS\Parameters" -Name "IsSlave" -Value 1 } -Credential $Credential
        }
    }

    End {
    }
}

Function Set-DnsServerRecursionAndForwarders {
    <#
  .SYNOPSIS
   The Windows 2012 DNS Server must prohibit recursion on authoritative name servers for which forwarders have not been configured for external queries.
 
  .DESCRIPTION
   The Set-DnsServerRecursionAndForwarders cmdlet checks to see if forwarders are disabled, if they are it also disables recursion. The command must be run with Enterprise Admin credentials.
 
  .PARAMETER Forest
   The DNS Forest to set the recursion setting on.
 
  .PARAMETER Credential
   The credential to use, requires Enterprise Admin rights.
 
        .EXAMPLE
   PS C:\>Set-DnsServerRecursionAndForwarders
 
         Disables recursion on all DNS servers without forwarders
 
  .INPUTS
   System.String
 
  .OUTPUTS
   None
 
  .NOTES
   AUTHOR: Michael Haken
   LAST UPDATE: 2/28/2016
 
  .FUNCTIONALITY
   STIG
    Microsoft Windows 2012 Server DNS V1R2
   STIG ID
    WDNS-CM-000003
   Rule ID
    SV-73009r1
   Vuln ID
    V-58579
   Severity
    CAT II    
 #>


    Param(
        [Parameter(Position=0,ValueFromPipeline=$true)]
        [string]$Forest = [System.String]::Empty,

        [Parameter()]
        [ValidateNotNull()]
        [System.Management.Automation.PSCredential]
        [System.Management.Automation.Credential()]
        $Credential = [System.Management.Automation.PSCredential]::Empty 
    )

    Begin {
    }

    Process 
    {
        if (!(Test-IsEnterpriseAdmin -Credential $Credential))
        {
            Write-Error "The cmdlet must be run with Enterprise Admin credentials."
            Exit 1
        }

        Write-Host "Setting DNS recursion and forwarders settings."

        $Servers = Get-ForestDnsServers -Forest $Forest -Credential $Credential

        foreach ($Server in $Servers)
        {
            $Forwarders = Get-DnsServerForwarder -ComputerName $Server

            if ($Forwarders.IPAddress.Count -eq 0)
            {
                Set-DnsServerRecursion -ComputerName $Server -Enable $false
            }
        }

        Write-Host "Completed setting recursions and forwarders."
    }

    End {    
    }
}

Function Set-DnsServerZoneSecureUpdates {
    <#
  .SYNOPSIS
   The Windows 2012 DNS Server must restrict incoming dynamic update requests to known clients.
 
  .DESCRIPTION
   The Set-DnsServerZoneSecureUpdates cmdlet turns on secure updates only for all DNS servers in the forest. The command must be run with Enterprise Admin credentials.
 
  .PARAMETER Forest
   The DNS Forest to set secure updates on.
 
  .PARAMETER Credential
   The credential to use, requires Enterprise Admin rights.
 
        .EXAMPLE
   PS C:\>Set-DnsServerZoneSecureUpdates
 
         Enforces secure updates on each primary zone in the current user forest.
 
  .INPUTS
   System.String
 
  .OUTPUTS
   None
 
  .NOTES
   AUTHOR: Michael Haken
   LAST UPDATE: 2/28/2016
 
  .FUNCTIONALITY
   STIG
    Microsoft Windows 2012 Server DNS V1R2
   STIG ID
    WDNS-AC-000001
    WDNS-IA-000001
   Rule ID
    SV-72667r1
    SV-73061r1
   Vuln ID
    V-58237
    V-58631
   Severity
    CAT II
 #>


    Param(
        [Parameter(Position=0,ValueFromPipeline=$true)]
        [string]$Forest = [System.String]::Empty,

        [Parameter()]
        [ValidateNotNull()]
        [System.Management.Automation.PSCredential]
        [System.Management.Automation.Credential()]
        $Credential = [System.Management.Automation.PSCredential]::Empty 
    )

    Begin {
    }

    Process 
    {
        if (!(Test-IsEnterpriseAdmin -Credential $Credential))
        {
            Write-Error "The cmdlet must be run with Enterprise Admin credentials."
            Exit 1
        }

        Write-Host "Setting secure updates on Dns Servers."

        Get-ForestDnsZones -Forest $Forest -ZoneType Primary -DsIntegration DsIntegrated -Credential $Credential | ForEach-Object {
            Write-Host "Configuring secure dynamic updates on $($_.ZoneName)"
            
            $Zone = $_.ZoneName
            try
            {
                $Server = Resolve-DnsName -Name $_.ZoneName -ErrorAction Stop | Select-Object -ExpandProperty PrimaryServer -ErrorAction SilentlyContinue
                
                if ([System.String]::IsNullOrEmpty($Server)) {
                    Write-Verbose -Message "PrimaryServer attribute was null, using the zone name for the server."
                    $Server = $_.ZoneName
                }

                Set-DnsServerPrimaryZone -Name $_.ZoneName -DynamicUpdate Secure -ComputerName $Server
            }
            catch [Exception]
            {
                Write-Warning "Error setting secure dynamic updates on $Zone`: $($_.ToString())"
            }
        }

        Write-Host "Completed setting secure updates."
    }

    End {        
    }
}

Function Set-DnsServerLogging {
    <#
  .SYNOPSIS
   The Windows 2012 DNS Server must be configured to record, and make available to authorized personnel, who added/modified/deleted DNS zone information.
 
  .DESCRIPTION
   The cmdlet turns on logging and log rollover on every DNS server in the forest. The command must be run with Enterprise Admin credentials.
 
  .PARAMETER Forest
   The DNS Forest to set secure updates on.
 
  .PARAMETER Credential
   The credential to use, requires Enterprise Admin rights.
 
        .EXAMPLE
   PS C:\>Set-DnsServerLogging
 
         Enables logging on every DNS server in the current user's forest.
 
  .INPUTS
   System.String
 
  .OUTPUTS
   None
 
  .NOTES
   AUTHOR: Michael Haken
   LAST UPDATE: 2/28/2016
 
  .FUNCTIONALITY
   STIG
    Microsoft Windows 2012 Server DNS V1R2
   STIG ID
    WDNS-AU-000001
    WDNS-AU-000005
    WDNS-AU-000006
    WDNS-AU-000007
    WDNS-AU-000008
    WDNS-AU-000010
    WDNS-AU-000011
    WDNS-AU-000012
    WDNS-AU-000013
    WDNS-AU-000014
    WDNS-AU-000015
    WDNS-SI-000009
   Rule ID
    SV-72973r1
    SV-72979r1
    SV-72981r1
    SV-72983r1
    SV-72985r1
    SV-72991r1
    SV-72993r1
    SV-72995r1
    SV-72997r1
    SV-72999r1
    SV-73001r1
    SV-73149r1
   Vuln ID
    V-58543
    V-58549
    V-58551
    V-58553
    V-58555
    V-58561
    V-58563
    V-58565
    V-58567
    V-58569
    V-58571
    V-58719
   Severity
    CAT II
 #>


    Param(
        [Parameter(Position=0,ValueFromPipeline=$true)]
        [string]$Forest = [System.String]::Empty,

        [Parameter()]
        [ValidateNotNull()]
        [System.Management.Automation.PSCredential]
        [System.Management.Automation.Credential()]
        $Credential = [System.Management.Automation.PSCredential]::Empty 
    )

    Begin {
    }

    Process
    {
        if (!(Test-IsEnterpriseAdmin -Credential $Credential))
        {
            Write-Error "The cmdlet must be run with Enterprise Admin credentials."
            Exit 1
        }

        Write-Host "Setting Dns Server logging."

        Get-ForestDnsServers -Forest $Forest -Credential $Credential | ForEach-Object {
            Set-DnsServerDiagnostics -ComputerName $_ -All $true
            Set-DnsServerDiagnostics -EnableLogFileRollover $true
        }

        Write-Host "Completed setting Dns Server logging."
    }

    End {        
    }
}

Function Set-DnsServerVersionQuery {
    <#
  .SYNOPSIS
   The DNS Name Server software must be configured to refuse queries for its version information.
 
  .DESCRIPTION
   The Set-DnsServerVersionQuery cmdlet disables returning version information from a DNS query on all DNS servers in the Forest. The command must be run with Enterprise Admin credentials.
 
  .PARAMETER Forest
   The forest to configure.
 
  .PARAMETER Credential
   The credential to use, requires Enterprise Admin rights.
 
        .EXAMPLE
   PS C:\>Set-DnsServerVersionQuery
 
         Disables the return of version information from DNS queries.
 
  .INPUTS
   System.String
 
  .OUTPUTS
   None
 
  .NOTES
   AUTHOR: Michael Haken
   LAST UPDATE: 2/28/2016
 
  .FUNCTIONALITY
   STIG
    Microsoft Windows 2012 Server DNS V1R2
   STIG ID
    WDNS-SI-000003
   Rule ID
    SV-73167r1
   Vuln ID
    V-58737
   Severity
    CAT II    
 #>


    Param(
        [Parameter(Position=0,ValueFromPipeline=$true)]
        [string]$Forest = [System.String]::Empty,

        [Parameter()]
        [ValidateNotNull()]
        [System.Management.Automation.PSCredential]
        [System.Management.Automation.Credential()]
        $Credential = [System.Management.Automation.PSCredential]::Empty  
    )

    Begin {        
    }

    Process
    {
        if (!(Test-IsEnterpriseAdmin -Credential $Credential))
        {
            Write-Error "The cmdlet must be run with Enterprise Admin credentials."
            Exit 1
        }

        Write-Host "Setting Dns Server version query settings."

        Get-ForestDnsServers -Forest $Forest -Credential $Credential |  ForEach-Object {
            $Server = $_

            try
            {
                Invoke-Command -ComputerName $_ -ScriptBlock {Set-ItemProperty -Path "HKLM:\\SYSTEM\\CurrentControlSet\\Services\\DNS\\Parameters" -Name "EnableVersionQuery" -Value 0} -Credential $Credential
            }
            catch [Exception] 
            {
                Write-Host "Error on $Server`: $($_.ToString())"
            }
        }

        Write-Host "Completed setting Dns Server version query settings."
    }

    End {
    }
}

Function Get-ForestDnsServers {
    <#
  .SYNOPSIS
   Finds all of the DNS servers for the current forest.
 
  .DESCRIPTION
   Finds all of the DNS servers registered as NS servers in the forest and returns an array of DNS names.
 
  .PARAMETER Forest
   Specify the forest to get the name servers from.
 
  .PARAMETER Credential
   The credential to use to query for the current AD Forest object.
 
        .EXAMPLE
   PS C:\>Get-ForestDnsServers
 
   Gets all of the DNS server in the current forest.
 
  .INPUTS
   System.String
 
  .OUTPUTS
   System.String[]
 
  .NOTES
   AUTHOR: Michael Haken
   LAST UPDATE: 2/28/2016    
 #>


    Param (
        [Parameter(Position=0,ValueFromPipeline=$true)]
        [string]$Forest = [System.String]::Empty,

        [Parameter()]
        [ValidateNotNull()]
        [System.Management.Automation.PSCredential]
        [System.Management.Automation.Credential()]
        $Credential = [System.Management.Automation.PSCredential]::Empty 
    )

    Begin 
    {
        try {
            Import-Module ActiveDirectory
        }
        catch [Exception] {
            Write-Warning "This cmdlet requires the Active Directory module."
            Exit 1
        }
    }

    Process
    {
        if ($Forest -eq [System.String]::Empty)
        {
            if ($Credential -ne [PSCredential]::Empty)
            {
                $RootDomain = (Get-ADForest -Current $Credential.UserName -Credential $Credential).RootDomain
            }
            else
            {
                $RootDomain = (Get-ADForest -Current LoggedOnUser).RootDomain
            }
        }
        else
        {
            $RootDomain = $Forest
        }

        Write-Output -InputObject (Resolve-DnsName -Name $RootDomain -Type NS | Where-Object {![System.String]::IsNullOrEmpty($_.NameHost)} | Select-Object -ExpandProperty NameHost)
    }

    End {
    }
}

Function Get-ForestDnsZones {
    <#
  .SYNOPSIS
   Get all of the forward lookup zones in a forest.
 
  .DESCRIPTION
   The Get-ForestDnsZones cmdlet gets all of the primary forward lookup zones for a forest.
 
  .PARAMETER Forest
   The DNS Forest to search.
 
  .PARAMETER ZoneType
   Select from All, Primary, Seconday, or Stub. Defaults to All.
 
  .PARAMETER DsIntegration
   Select from All, DsIntegrated, or NonDsIntegrated. Defaults to All.
 
  .PARAMETER LookupType
   Select from All, Forward, or Reverse. Defaults to All.
 
  .PARAMETER Credential
   The credential to use.
 
        .EXAMPLE
   PS C:\>Get-ForestDnsZones
 
         Gets all of the dns zones in the current user's forest.
 
  .EXAMPLE
   PS C:\>Get-ForestDnzZones -ZoneType Primary -DsIntegration DsIntegrated -LookupType Forward
 
   Gets all primary, Active Directory integrated, forward lookup zones in the current user forest.
 
  .INPUTS
   None
 
  .OUTPUTS
   PSObject[]
 
  .NOTES
   AUTHOR: Michael Haken
   LAST UPDATE: 2/28/2016    
 #>


    Param(
        [Parameter(Position=0)]
        [string]$Forest = [System.String]::Empty,

        [Parameter(Position=1)]
        [ValidateSet("All","Primary","Secondary","Stub")]
        [string]$ZoneType = "All",

        [Parameter(Position=2)]
        [ValidateSet("All","DsIntegrated","NonDsIntegrated")]
        [string]$DsIntegration = "All",

        [Parameter(Position=3)]
        [ValidateSet("All","Forward","Reverse")]
        [string]$LookupType = "All",

        [Parameter()]
        [ValidateNotNull()]
        [System.Management.Automation.PSCredential]
        [System.Management.Automation.Credential()]
        $Credential = [System.Management.Automation.PSCredential]::Empty 
    )

    Begin {
    }

    Process
    {
        $Zones = @()

        Get-ForestDNSServers -Forest $Forest -Credential $Credential | ForEach-Object {
            $Zones += Get-SpecificServerDnsZones -ComputerName $_ -ZoneType $ZoneType -DsIntegration $DsIntegration -LookupType $LookupType | Where-Object {-not $_.ZoneName.StartsWith("_")}
        }

        $Zones | Group-Object -Property ZoneName | Select-Object -Property Group | ForEach-Object {
            Write-Output -InputObject ($_.Group | Select-Object -First 1)
        }
    }
    
    End {        
    }
}

Function Get-SpecificServerDnsZones {
    <#
  .SYNOPSIS
   Get all of the forward lookup zones in a forest.
 
  .DESCRIPTION
   The Get-ForestDnsZones cmdlet gets all of the primary forward lookup zones for a forest.
 
  .PARAMETER Forest
   The DNS Forest to search.
 
  .PARAMETER ZoneType
   Select from All, Primary, Seconday, or Stub. Defaults to All.
 
  .PARAMETER DsIntegration
   Select from All, DsIntegrated, or NonDsIntegrated. Defaults to All.
 
  .PARAMETER LookupType
   Select from All, Forward, or Reverse. Defaults to All.
 
        .EXAMPLE
   PS C:\>Get-SpecificServerDnsZones
 
         Gets all of the dns zones on the localhost.
 
  .EXAMPLE
   PS C:\>Get-SpecificServerDnsZones -ComputerName server01
 
         Gets all of the dns zones on server01.
 
  .EXAMPLE
   PS C:\>Get-SpecificServerDnsZones -ComputerName server01 -ZoneType Primary -DsIntegration DsIntegrated -LookupType Forward
 
   Gets all primary, Active Directory integrated, forward lookup zones on server01.
 
  .INPUTS
   None
 
  .OUTPUTS
   PSObject[]
 
  .NOTES
   AUTHOR: Michael Haken
   LAST UPDATE: 2/28/2016    
 #>


    Param(
        [Parameter(Position=0)]
        [string]$ComputerName ="localhost",

        [Parameter(Position=1)]
        [ValidateSet("All","Primary","Secondary","Stub")]
        [string]$ZoneType = "All",

        [Parameter(Position=2)]
        [ValidateSet("All","DsIntegrated","NonDsIntegrated")]
        [string]$DsIntegration = "All",

        [Parameter(Position=3)]
        [ValidateSet("All","Forward","Reverse")]
        [string]$LookupType = "All"
    )

    Begin {}

    Process
    {
        switch (($ZoneType + $DsIntegration + $LookupType))
        {
            default {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue)}
            "AllAllAll" {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue)}
            "AllAllForward" {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue | Where-Object {$_.IsReverseLookupzone -eq $false})}
            "AllAllReverse" {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue | Where-Object {$_.IsReverseLookupzone -eq $true})}
            "AllDsIntegratedAll" {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue | Where-Object {$_.IsDsIntegrated -eq $true})}
            "AllDsIntegratedForward" {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue | Where-Object {$_.IsDsIntegrated -eq $true -and $_.IsReverseLookupZone -eq $false})}
            "AllDsIntegratedReverse" {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue | Where-Object {$_.IsDsIntegrated -eq $true -and $_.IsReverseLookupzone -eq $true})}
            "AllNonDsIntegratedAll" {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue | Where-Object {$_.IsDsIntegrated -eq $false})}
            "AllNonDsIntegratedForward" {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue | Where-Object {$_.IsDsIntegrated -eq $false -and $_.IsReverseLookupZone -eq $false})}
            "AllNonDsIntegratedReverse" {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue | Where-Object {$_.IsDsIntegrated -eq $false -and $_.IsReverseLookupzone -eq $true})}

            "PrimaryAllAll" {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue | Where-Object {$_.ZoneType -eq "Primary"})}
            "PrimaryAllForward" {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue | Where-Object {$_.ZoneType -eq "Primary" -and $_.IsReverseLookup -eq $false})}
            "PrimaryAllReverse" {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue | Where-Object {$_.ZoneType -eq "Primary" -and $_.IsReverseLookup -eq $true})}
            "PrimaryDsIntegratedAll" {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue | Where-Object {$_.ZoneType -eq "Primary" -and $_.IsDsIntegrated -eq $true})}
            "PrimaryDsIntegratedForward" {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue | Where-Object {$_.ZoneType -eq "Primary" -and $_.IsDsIntegrated -eq $true -and $_.IsReverseLookupZone -eq $false})}
            "PrimaryDsIntegratedReverse" {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue | Where-Object {$_.ZoneType -eq "Primary" -and $_.IsDsIntegrated -eq $true -and $_.IsReverseLookupZone -eq $true})}
            "PrimaryNonDsIntegratedAll" {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue | Where-Object {$_.ZoneType -eq "Primary" -and $_.IsDsIntegrated -eq $false})}
            "PrimaryNonDsIntegratedForward" {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue | Where-Object {$_.ZoneType -eq "Primary" -and $_.IsDsIntegrated -eq $false -and $_.IsReverseLookupZone -eq $false})}
            "PrimaryNonDsIntegratedReverse" {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue | Where-Object {$_.ZoneType -eq "Primary" -and $_.IsDsIntegrated -eq $true -and $_.IsReverseLookupZone -eq $true})}

            "SecondaryAllAll" {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue | Where-Object {$_.ZoneType -eq "Secondary"})}
            "SecondaryAllForward" {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue | Where-Object {$_.ZoneType -eq "Secondary" -and $_.IsReverseLookup -eq $false})}
            "SecondaryAllReverse" {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue | Where-Object {$_.ZoneType -eq "Secondary" -and $_.IsReverseLookup -eq $true})}
            "SecondaryDsIntegratedAll" {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue | Where-Object {$_.ZoneType -eq "Secondary" -and $_.IsDsIntegrated -eq $true})}
            "SecondaryDsIntegratedForward" {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue | Where-Object {$_.ZoneType -eq "Secondary" -and $_.IsDsIntegrated -eq $true -and $_.IsReverseLookupZone -eq $false})}
            "SecondaryDsIntegratedReverse" {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue | Where-Object {$_.ZoneType -eq "Secondary" -and $_.IsDsIntegrated -eq $true -and $_.IsReverseLookupZone -eq $true})}
            "SecondaryNonDsIntegratedAll" {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue | Where-Object {$_.ZoneType -eq "Secondary" -and $_.IsDsIntegrated -eq $false})}
            "SecondaryNonDsIntegratedForward" {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue | Where-Object {$_.ZoneType -eq "Secondary" -and $_.IsDsIntegrated -eq $false -and $_.IsReverseLookupZone -eq $false})}
            "SecondaryNonDsIntegratedReverse" {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue | Where-Object {$_.ZoneType -eq "Secondary" -and $_.IsDsIntegrated -eq $true -and $_.IsReverseLookupZone -eq $true})}

            "StubAllAll" {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue | Where-Object {$_.ZoneType -eq "Stub"})}
            "StubAllForward" {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue | Where-Object {$_.ZoneType -eq "Stub" -and $_.IsReverseLookup -eq $false})}
            "StubAllReverse" {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue | Where-Object {$_.ZoneType -eq "Stub" -and $_.IsReverseLookup -eq $true})}
            "StubDsIntegratedAll" {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue | Where-Object {$_.ZoneType -eq "Stub" -and $_.IsDsIntegrated -eq $true})}
            "StubDsIntegratedForward" {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue | Where-Object {$_.ZoneType -eq "Stub" -and $_.IsDsIntegrated -eq $true -and $_.IsReverseLookupZone -eq $false})}
            "StubDsIntegratedReverse" {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue | Where-Object {$_.ZoneType -eq "Stub" -and $_.IsDsIntegrated -eq $true -and $_.IsReverseLookupZone -eq $true})}
            "StubNonDsIntegratedAll" {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue | Where-Object {$_.ZoneType -eq "Stub" -and $_.IsDsIntegrated -eq $false})}
            "StubNonDsIntegratedForward" {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue | Where-Object {$_.ZoneType -eq "Stub" -and $_.IsDsIntegrated -eq $false -and $_.IsReverseLookupZone -eq $false})}
            "StubNonDsIntegratedReverse" {Write-Output (Get-DnsServerZone -ComputerName $ComputerName -WarningAction SilentlyContinue | Where-Object {$_.ZoneType -eq "Stub" -and $_.IsDsIntegrated -eq $true -and $_.IsReverseLookupZone -eq $true})}
        }
    }
    
    End {}
}

Function Set-ForestDnsServerScavenging {
    <#
  .SYNOPSIS
   Sets DNS record scavenging for all zones in the Forest.
 
  .DESCRIPTION
   Creates the File Access Rules for EventLog, System, and Administrators.
 
  .PARAMETER RefreshInterval
   Specifies the refresh interval as a TimeSpan object. During this interval, a DNS server can refresh a resource record that has a non-zero time stamp. Zones on the server inherit this value automatically.
    
   If a DNS server does not refresh a resource record that has a non-zero time stamp, the DNS server can remove that record during the next scavenging.
 
   Do not select a value smaller than the longest refresh period of a resource record registered in the zone.
 
   The minimum value is 0. The maximum value is 8760 hours (seven days). The default value is 7 days.
 
  .PARAMETER ScavengingInterval
   Specifies a length of time as a TimeSpan object. ScavengingInterval determines whether the scavenging feature for the DNS server is enabled and sets the number of hours between scavenging cycles.
 
   The default setting is 7. A setting greater than 0 enables scavenging for the server and sets the number of days, hours, minutes, and seconds (formatted as dd.hh:mm:ss) between scavenging cycles. The minimum value is 0. The maximum value is 365.00:00:00 (1 year).
 
        .EXAMPLE
   PS C:\>Set-ForestDnsServerScavenging
 
   Enables stale record scavenging
 
  .INPUTS
   System.TimeSpan, System.TimeSpan
 
  .OUTPUTS
   Microsoft.Management.Infrastructure.CimInstance#DnsServerScavenging[]
 
  .NOTES
   AUTHOR: Michael Haken
   LAST UPDATE: 2/28/2016
 #>

    [CmdletBinding()]
    Param(
        [Parameter(Position=0)]
        [System.TimeSpan]$RefreshInterval = [System.TimeSpan]::FromDays(7),

        [Parameter(Position=1)]
        [System.TimeSpan]$ScavengingInterval = [System.TimeSpan]::FromDays(7),

        [Parameter()]
        [switch]$PassThru
    )

    Begin {        
    }

    Process {
        $Forest = Get-ADForest

        Write-Host "Setting DNS Server Scavenging."

        foreach ($Domain in $Forest.Domains)
        {
            $Context = New-Object System.DirectoryServices.ActiveDirectory.DirectoryContext([System.DirectoryServices.ActiveDirectory.DirectoryContextType]::Domain, $Domain)
            $Servers = [System.DirectoryServices.ActiveDirectory.DomainController]::FindAll($Context)
            
            foreach ($Server in $Servers)
            {
                try {
                    $Scavenging = Set-DnsServerScavenging -ScavengingState $true -ApplyOnAllZones -ComputerName $Server.Name -RefreshInterval ([System.TimeSpan]::FromDays(7)) -ScavengingInterval ([System.TimeSpan]::FromDays(7)) -PassThru

                    if ($PassThru) {
                        Write-Output $Scavenging
                    }
                }
                catch [Exception] {
                    Write-Warning $_.Exception.Message
                }
            }
        } 
    }
    
    End {
    }
}

Function New-EventLogAccessRuleSet {
    <#
  .SYNOPSIS
   Creates the File Access Rules for EventLog, System, and Administrators.
 
  .DESCRIPTION
   Creates the File Access Rules for EventLog, System, and Administrators.
 
        .EXAMPLE
   PS C:\>New-EventLogAccessRuleSet
 
   Creates the rule set.
 
  .INPUTS
   None
 
  .OUTPUTS
   System.Security.AccessControl.FileSystemAccessRule[]
 
  .NOTES
   AUTHOR: Michael Haken
   LAST UPDATE: 2/28/2016
 #>

    [CmdletBinding()]
    Param(
    )

    Begin {
    }

    Process {
        # NT Service\EventLog = S-1-5-80-880578595-1860270145-482643319-2788375705-1540778122
        [System.Security.Principal.SecurityIdentifier]$NTServiceEventLogSid = New-Object System.Security.Principal.SecurityIdentifier("S-1-5-80-880578595-1860270145-482643319-2788375705-1540778122")
        $Administrators = New-Object Security.Principal.SecurityIdentifier([System.Security.Principal.WellKnownSidType]::BuiltinAdministratorsSid, $null)
        $EventLog = New-Object Security.Principal.SecurityIdentifier($NTServiceEventLogSid)
        $System = New-Object  Security.Principal.SecurityIdentifier([System.Security.Principal.WellKnownSidType]::LocalSystemSid, $null)

        $AdministratorAce = New-Object System.Security.AccessControl.FileSystemAccessRule($Administrators, 
            [System.Security.AccessControl.FileSystemRights]::FullControl, 
            @([System.Security.AccessControl.InheritanceFlags]::ContainerInherit, [System.Security.AccessControl.InheritanceFlags]::ObjectInherit),
            [System.Security.AccessControl.PropagationFlags]::None,
            [System.Security.AccessControl.AccessControlType]::Allow)

        $EventLogAce = New-Object System.Security.AccessControl.FileSystemAccessRule($EventLog, 
            [System.Security.AccessControl.FileSystemRights]::FullControl, 
            @([System.Security.AccessControl.InheritanceFlags]::ContainerInherit, [System.Security.AccessControl.InheritanceFlags]::ObjectInherit),
            [System.Security.AccessControl.PropagationFlags]::None,
            [System.Security.AccessControl.AccessControlType]::Allow)

        $SystemAce = New-Object System.Security.AccessControl.FileSystemAccessRule($System, 
            [System.Security.AccessControl.FileSystemRights]::FullControl, 
            @([System.Security.AccessControl.InheritanceFlags]::ContainerInherit, [System.Security.AccessControl.InheritanceFlags]::ObjectInherit),
            [System.Security.AccessControl.PropagationFlags]::None,
            [System.Security.AccessControl.AccessControlType]::Allow)


        [System.Security.AccessControl.FileSystemAccessRule[]]$Rules = @($AdministratorAce, $EventLogAce, $SystemAce)

        Write-Output -InputObject $Rules
    }

    End {    
    }
}

Function New-CryptoFolderAccessRuleSet {
    <#
  .SYNOPSIS
   Creates the File Access Rules for System and Administrators.
 
  .DESCRIPTION
   Creates the File Access Rules for System and Administrators.
 
        .EXAMPLE
   PS C:\>New-CryptoFolderAccessRuleSet
 
   Creates the rule set.
  .INPUTS
   None
 
  .OUTPUTS
   System.Security.AccessControl.FileSystemAccessRule[]
 
  .NOTES
   AUTHOR: Michael Haken
   LAST UPDATE: 2/28/2016
 #>

    [CmdletBinding()]
    Param()

    Begin {
    }

    Process {
        [System.Security.Principal.SecurityIdentifier]$NTServiceEventLogSid = New-Object System.Security.Principal.SecurityIdentifier("S-1-5-80-880578595-1860270145-482643319-2788375705-1540778122")
        $Administrators = New-Object Security.Principal.SecurityIdentifier([System.Security.Principal.WellKnownSidType]::BuiltinAdministratorsSid, $null)
        $System = New-Object  Security.Principal.SecurityIdentifier([System.Security.Principal.WellKnownSidType]::LocalSystemSid, $null)

        $AdministratorAce = New-Object System.Security.AccessControl.FileSystemAccessRule($Administrators, 
            [System.Security.AccessControl.FileSystemRights]::FullControl, 
            @([System.Security.AccessControl.InheritanceFlags]::ContainerInherit, [System.Security.AccessControl.InheritanceFlags]::ObjectInherit),
            [System.Security.AccessControl.PropagationFlags]::None,
            [System.Security.AccessControl.AccessControlType]::Allow)

        $SystemAce = New-Object System.Security.AccessControl.FileSystemAccessRule($System, 
            [System.Security.AccessControl.FileSystemRights]::FullControl, 
            @([System.Security.AccessControl.InheritanceFlags]::ContainerInherit, [System.Security.AccessControl.InheritanceFlags]::ObjectInherit),
            [System.Security.AccessControl.PropagationFlags]::None,
            [System.Security.AccessControl.AccessControlType]::Allow)

        [System.Security.AccessControl.FileSystemAccessRule[]] $Rules = @($AdministratorAce, $SystemAce)

        Write-Output -InputObject $Rules
    }

    End {        
    }
}