Src/Private/Get-AbrADDNSInfrastructure.ps1
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function Get-AbrADDNSInfrastructure { <# .SYNOPSIS Used by As Built Report to retrieve Microsoft AD Domain Name System Infrastructure information. .DESCRIPTION .NOTES Version: 0.8.1 Author: Jonathan Colon Twitter: @jcolonfzenpr Github: rebelinux .EXAMPLE .LINK #> [CmdletBinding()] param ( [Parameter ( Position = 0, Mandatory)] [string] $Domain ) begin { Write-PScriboMessage "Collecting Active Directory Domain Name System Infrastructure information for $Domain" } process { try { $DCs = Invoke-Command -Session $TempPssSession { Get-ADDomain -Identity $using:Domain | Select-Object -ExpandProperty ReplicaDirectoryServers | Where-Object { $_ -notin ($using:Options).Exclude.DCs } } if ($DCs) { Section -Style Heading3 "Infrastructure Summary" { Paragraph "The following section provides a summary of the DNS Infrastructure configuration." BlankLine $OutObj = @() foreach ($DC in $DCs) { if (Test-Connection -ComputerName $DC -Quiet -Count 2) { try { $DNSSetting = Get-DnsServerSetting -CimSession $TempCIMSession -ComputerName $DC $inObj = [ordered] @{ 'DC Name' = $($DC.ToString().ToUpper().Split(".")[0]) 'Build Number' = ConvertTo-EmptyToFiller $DNSSetting.BuildNumber 'IPv6' = ConvertTo-EmptyToFiller (ConvertTo-TextYN $DNSSetting.EnableIPv6) 'DnsSec' = ConvertTo-EmptyToFiller (ConvertTo-TextYN $DNSSetting.EnableDnsSec) 'ReadOnly DC' = ConvertTo-EmptyToFiller (ConvertTo-TextYN $DNSSetting.IsReadOnlyDC) 'Listening IP' = $DNSSetting.ListeningIPAddress } $OutObj += [pscustomobject]$inobj } catch { Write-PScriboMessage -IsWarning "DNS Infrastructure Summary Section: $($_.Exception.Message)" } } else { Write-PScriboMessage -IsWarning "DNS Infrastructure Summary Section: Unable to connect to DC server $DC" } } $TableParams = @{ Name = "Infrastructure Summary - $($Domain.ToString().ToUpper())" List = $false ColumnWidths = 30, 10, 9, 10, 11, 30 } if ($Report.ShowTableCaptions) { $TableParams['Caption'] = "- $($TableParams.Name)" } $OutObj | Sort-Object -Property 'DC Name' | Table @TableParams #---------------------------------------------------------------------------------------------# # DNS Aplication Partitions Section # #---------------------------------------------------------------------------------------------# if ($InfoLevel.DNS -ge 2) { try { Section -Style Heading4 "Application Directory Partition" { Paragraph "The following section provides Directory Partition information." BlankLine foreach ($DC in $DCs) { if (Test-Connection -ComputerName $DC -Quiet -Count 2) { try { Section -ExcludeFromTOC -Style NOTOCHeading5 $($DC.ToString().ToUpper().Split(".")[0]) { $OutObj = @() $DNSSetting = Get-DnsServerDirectoryPartition -CimSession $TempCIMSession -ComputerName $DC foreach ($Partition in $DNSSetting) { try { $inObj = [ordered] @{ 'Name' = $Partition.DirectoryPartitionName 'State' = Switch ($Partition.State) { $Null { '--' } 0 { 'DNS_DP_OKAY' } 1 { 'DNS_DP_STATE_REPL_INCOMING' } 2 { 'DNS_DP_STATE_REPL_OUTGOING' } 3 { 'DNS_DP_STATE_UNKNOWN' } default { $Partition.State } } 'Flags' = $Partition.Flags 'Zone Count' = $Partition.ZoneCount } $OutObj += [pscustomobject]$inobj } catch { Write-PScriboMessage -IsWarning "Directory Partitions Item Section: $($_.Exception.Message)" } } $TableParams = @{ Name = "Directory Partitions - $($DC.ToString().ToUpper().Split(".")[0])" List = $false ColumnWidths = 40, 25, 25, 10 } if ($Report.ShowTableCaptions) { $TableParams['Caption'] = "- $($TableParams.Name)" } $OutObj | Sort-Object -Property 'Name' | Table @TableParams } } catch { Write-PScriboMessage -IsWarning "Directory Partitions Table Section: $($_.Exception.Message)" } } else { Write-PScriboMessage -IsWarning "DNS Directory Partition Section: Unable to connect to DC server $DC" } } } } catch { Write-PScriboMessage -IsWarning "Directory Partitions Section: $($_.Exception.Message)" } } #---------------------------------------------------------------------------------------------# # DNS RRL Section # #---------------------------------------------------------------------------------------------# if ($InfoLevel.DNS -ge 2) { try { Section -Style Heading4 "Response Rate Limiting (RRL)" { $OutObj = @() foreach ($DC in $DCs) { if (Test-Connection -ComputerName $DC -Quiet -Count 2) { try { $DNSSetting = Get-DnsServerResponseRateLimiting -CimSession $TempCIMSession -ComputerName $DC $inObj = [ordered] @{ 'DC Name' = $($DC.ToString().ToUpper().Split(".")[0]) 'Status' = ConvertTo-EmptyToFiller $DNSSetting.Mode 'Responses Per Sec' = ConvertTo-EmptyToFiller $DNSSetting.ResponsesPerSec 'Errors Per Sec' = ConvertTo-EmptyToFiller $DNSSetting.ErrorsPerSec 'Window In Sec' = ConvertTo-EmptyToFiller $DNSSetting.WindowInSec 'Leak Rate' = ConvertTo-EmptyToFiller $DNSSetting.LeakRate 'Truncate Rate' = ConvertTo-EmptyToFiller $DNSSetting.TruncateRate } $OutObj += [pscustomobject]$inobj } catch { Write-PScriboMessage -IsWarning "$($_.Exception.Message) (Response Rate Limiting (RRL) Item)" } } else { Write-PScriboMessage -IsWarning "DNS Response Rate Limiting (RRL) Section: Unable to connect to DC server $DC" } } $TableParams = @{ Name = "Response Rate Limiting - $($Domain.ToString().ToUpper())" List = $false ColumnWidths = 30, 10, 12, 12, 12, 12, 12 } if ($Report.ShowTableCaptions) { $TableParams['Caption'] = "- $($TableParams.Name)" } $OutObj | Sort-Object -Property 'DC Name' | Table @TableParams } } catch { Write-PScriboMessage -IsWarning "$($_.Exception.Message) (Response Rate Limiting (RRL) Table)" } } #---------------------------------------------------------------------------------------------# # DNS Scanvenging Section # #---------------------------------------------------------------------------------------------# if ($InfoLevel.DNS -ge 2) { try { Section -Style Heading4 "Scavenging Options" { $OutObj = @() foreach ($DC in $DCs) { if (Test-Connection -ComputerName $DC -Quiet -Count 2) { try { $DNSSetting = Get-DnsServerScavenging -CimSession $TempCIMSession -ComputerName $DC $inObj = [ordered] @{ 'DC Name' = $($DC.ToString().ToUpper().Split(".")[0]) 'NoRefresh Interval' = ConvertTo-EmptyToFiller $DNSSetting.NoRefreshInterval 'Refresh Interval' = ConvertTo-EmptyToFiller $DNSSetting.RefreshInterval 'Scavenging Interval' = ConvertTo-EmptyToFiller $DNSSetting.ScavengingInterval 'Last Scavenge Time' = Switch ($DNSSetting.LastScavengeTime) { "" { "--"; break } $Null { "--"; break } default { ConvertTo-EmptyToFiller ($DNSSetting.LastScavengeTime.ToString("MM/dd/yyyy")) } } 'Scavenging State' = Switch ($DNSSetting.ScavengingState) { "True" { "Enabled" } "False" { "Disabled" } default { ConvertTo-EmptyToFiller $DNSSetting.ScavengingState } } } $OutObj += [pscustomobject]$inobj } catch { Write-PScriboMessage -IsWarning "$($_.Exception.Message) (Scavenging Item)" } } else { Write-PScriboMessage -IsWarning "DNS Scavenging Section: Unable to connect to DC server $DC" } } if ($HealthCheck.DNS.Zones) { $OutObj | Where-Object { $_.'Scavenging State' -eq 'Disabled' } | Set-Style -Style Warning -Property 'Scavenging State' } $TableParams = @{ Name = "Scavenging - $($Domain.ToString().ToUpper())" List = $false ColumnWidths = 25, 15, 15, 15, 15, 15 } if ($Report.ShowTableCaptions) { $TableParams['Caption'] = "- $($TableParams.Name)" } $OutObj | Sort-Object -Property 'DC Name' | Table @TableParams if ($HealthCheck.DNS.Zones -and ($OutObj | Where-Object { $_.'Scavenging State' -eq 'Disabled' })) { Paragraph "Health Check:" -Bold -Underline BlankLine Paragraph { Text "Best Practices:" -Bold Text "Microsoft recommends to enable aging/scavenging on all DNS servers. However, with AD-integrated zones ensure to enable DNS scavenging on one DC at main site. The results will be replicated to other DCs." } } } } catch { Write-PScriboMessage -IsWarning "$($_.Exception.Message) (Scavenging Table)" } } #---------------------------------------------------------------------------------------------# # DNS Forwarder Section # #---------------------------------------------------------------------------------------------# try { Section -Style Heading4 "Forwarder Options" { $OutObj = @() foreach ($DC in $DCs) { if (Test-Connection -ComputerName $DC -Quiet -Count 2) { try { $DNSSetting = Get-DnsServerForwarder -CimSession $TempCIMSession -ComputerName $DC $Recursion = Get-DnsServerRecursion -CimSession $TempCIMSession -ComputerName $DC | Select-Object -ExpandProperty Enable $inObj = [ordered] @{ 'DC Name' = $($DC.ToString().ToUpper().Split(".")[0]) 'IP Address' = $DNSSetting.IPAddress.IPAddressToString 'Timeout' = ("$($DNSSetting.Timeout)/s") 'Use Root Hint' = ConvertTo-EmptyToFiller (ConvertTo-TextYN $DNSSetting.UseRootHint) 'Use Recursion' = ConvertTo-EmptyToFiller (ConvertTo-TextYN $Recursion) } $OutObj += [pscustomobject]$inobj } catch { Write-PScriboMessage -IsWarning "$($_.Exception.Message) (Forwarder Item)" } } else { Write-PScriboMessage -IsWarning "DNS Forwarder Section: Unable to connect to DC server $DC" } } if ($HealthCheck.DNS.BestPractice) { $OutObj | Where-Object { $_.'IP Address'.Count -gt 2 } | Set-Style -Style Warning -Property 'IP Address' $OutObj | Where-Object { $_.'IP Address'.Count -lt 2 } | Set-Style -Style Warning -Property 'IP Address' } $TableParams = @{ Name = "Forwarders - $($Domain.ToString().ToUpper())" List = $false ColumnWidths = 35, 15, 15, 15, 20 } if ($Report.ShowTableCaptions) { $TableParams['Caption'] = "- $($TableParams.Name)" } $OutObj | Sort-Object -Property 'DC Name' | Table @TableParams if ($HealthCheck.DNS.BestPractice -and (($OutObj | Where-Object { $_.'IP Address' -gt 2 }) -or ($OutObj | Where-Object { $_.'IP Address'.Count -lt 2 }))) { Paragraph "Health Check:" -Bold -Underline BlankLine if ($OutObj | Where-Object { $_.'IP Address' -gt 2 }) { Paragraph { Text "Best Practices:" -Bold Text "Configure the servers to use no more than two external DNS servers as Forwarders." } BlankLine Paragraph { Text "Reference:" -Bold Text "https://learn.microsoft.com/en-us/troubleshoot/windows-server/networking/forwarders-resolution-timeouts" -Color blue } BlankLine } if ($OutObj | Where-Object { $_.'IP Address'.Count -lt 2 }) { Paragraph { Text "Best Practices:" -Bold Text "For redundancy reason, more than one forwarding server should be configured" } } } } } catch { Write-PScriboMessage -IsWarning "$($_.Exception.Message) (Forwarder Table)" } #---------------------------------------------------------------------------------------------# # DNS Root Hints Section # #---------------------------------------------------------------------------------------------# if ($InfoLevel.DNS -ge 2) { try { Section -Style Heading4 "Root Hints" { Paragraph "The following section provides Root Hints information from domain $($Domain)." BlankLine foreach ($DC in $DCs) { if (Test-Connection -ComputerName $DC -Quiet -Count 2) { try { Section -ExcludeFromTOC -Style NOTOCHeading5 $($DC.ToString().ToUpper().Split(".")[0]) { $OutObj = @() $DNSSetting = Get-DnsServerRootHint -CimSession $TempCIMSession -ComputerName $DC -ErrorAction SilentlyContinue | Select-Object @{Name = "Name"; E = { $_.NameServer.RecordData.Nameserver } }, @{ Name = "IPv4Address"; E = { $_.IPAddress.RecordData.IPv4Address.IPAddressToString } }, @{ Name = "IPv6Address"; E = { $_.IPAddress.RecordData.IPv6Address.IPAddressToString } } if ($DNSSetting) { foreach ($Hints in $DNSSetting) { try { $inObj = [ordered] @{ 'Name' = $Hints.Name 'IPv4 Address' = Switch ([string]::IsNullOrEmpty($Hints.IPv4Address)) { $true { '--' } $false { $Hints.IPv4Address -split " " } default { 'Unknown' } } 'IPv6 Address' = Switch ([string]::IsNullOrEmpty($Hints.IPv6Address)) { $true { '--' } $false { $Hints.IPv6Address -split " " } default { 'Unknown' } } } $OutObj += [pscustomobject]$inobj } catch { Write-PScriboMessage -IsWarning $_.Exception.Message } } } else { $RootServers = @( "a.root-servers.net", "b.root-servers.net", "c.root-servers.net", "d.root-servers.net", "e.root-servers.net", "f.root-servers.net", "g.root-servers.net", "h.root-servers.net", "i.root-servers.net", "j.root-servers.net", "k.root-servers.net", "l.root-servers.net", "m.root-servers.net" ) foreach ($server in $RootServers) { $inObj = [ordered] @{ 'Name' = $server 'IPv4 Address' = "--" 'IPV6 Address' = "--" } $OutObj += [pscustomobject]$inobj } } if ($HealthCheck.DNS.BestPractice) { $OutObj | Where-Object { $_.'IPv4 Address' -eq '--' -and $_.'IPv6 Address' -eq '--' } | Set-Style -Style Warning -Property 'IPv4 Address', 'IPv6 Address' $OutObj | Where-Object { $_.'IPv4 Address'.Count -gt 1 } | Set-Style -Style Warning -Property 'IPv4 Address' $OutObj | Where-Object { $_.'IPv6 Address'.Count -gt 1 } | Set-Style -Style Warning -Property 'IPv6 Address' } $TableParams = @{ Name = "Root Hints - $($DC.ToString().ToUpper().Split(".")[0])" List = $false ColumnWidths = 40, 30, 30 } if ($Report.ShowTableCaptions) { $TableParams['Caption'] = "- $($TableParams.Name)" } $OutObj | Sort-Object -Property 'Name' | Table @TableParams if ($HealthCheck.DNS.BestPractice -and (($OutObj | Where-Object { $_.'IPv4 Address' -eq '--' -and $_.'IPv6 Address' -eq '--' }) -or (($OutObj | Where-Object { $_.'IPv4 Address'.Count -gt 1 }) -or ($OutObj | Where-Object { $_.'IPv6 Address'.Count -gt 1 })))) { Paragraph "Health Check:" -Bold -Underline BlankLine if ($OutObj | Where-Object { $_.'IPv4 Address' -eq '--' -and $_.'IPv6 Address' -eq '--' }) { Paragraph { Text "Corrective Actions:" -Bold Text "A default installation of the DNS server role should have root hints unless the server has a root zone - .(root). If the server has a root zone then delete it. If the server doesn't have a root zone and there are no root servers listed on the Root Hints tab of the DNS server properties then the server may be missing the cache.dns file in the %systemroot%\system32\dns directory, which is where the list of root servers is loaded from." } } if (($OutObj | Where-Object { $_.'IPv4 Address'.Count -gt 1 }) -or ($OutObj | Where-Object { $_.'IPv6 Address'.Count -gt 1 })) { Paragraph { Text "Corrective Actions:" -Bold Text "Duplicate IP Address found in the table of the DNS root hints servers. The DNS console does not show the duplicate Root Hint servers; you can only see them using the DNS PowerShell cmdlets. While there is a dnscmd utility to replace the Root Hints file, Using PowerShell is the best way to remediate this issue." } } } } } catch { Write-PScriboMessage -IsWarning "$($_.Exception.Message) (Root Hints Table)" } } else { Write-PScriboMessage -IsWarning "DNS Root Hints Section: Unable to connect to DC server $DC" } } } } catch { Write-PScriboMessage -IsWarning "$($_.Exception.Message) (Root Hints Section)" } } #---------------------------------------------------------------------------------------------# # DNS Zone Scope Section # #---------------------------------------------------------------------------------------------# if ($InfoLevel.DNS -ge 2) { try { Section -Style Heading4 "Zone Scope Recursion" { $OutObj = @() foreach ($DC in $DCs) { if (Test-Connection -ComputerName $DC -Quiet -Count 2) { try { $DNSSetting = Get-DnsServerRecursionScope -CimSession $TempCIMSession -ComputerName $DC $inObj = [ordered] @{ 'DC Name' = $($DC.ToString().ToUpper().Split(".")[0]) 'Zone Name' = Switch ($DNSSetting.Name) { "." { "Root" } default { ConvertTo-EmptyToFiller $DNSSetting.Name } } 'Forwarder' = $DNSSetting.Forwarder 'Use Recursion' = ConvertTo-EmptyToFiller (ConvertTo-TextYN $DNSSetting.EnableRecursion) } $OutObj += [pscustomobject]$inobj } catch { Write-PScriboMessage -IsWarning "$($_.Exception.Message) (Zone Scope Recursion Item)" } } else { Write-PScriboMessage -IsWarning "DNS Zone Scope Recursion Section: Unable to connect to DC server $DC" } } $TableParams = @{ Name = "Zone Scope Recursion - $($Domain.ToString().ToUpper())" List = $false ColumnWidths = 35, 25, 20, 20 } if ($Report.ShowTableCaptions) { $TableParams['Caption'] = "- $($TableParams.Name)" } $OutObj | Sort-Object -Property 'DC Name' | Table @TableParams } } catch { Write-PScriboMessage -IsWarning "$($_.Exception.Message) (Zone Scope Recursion Table)" } } } } } catch { Write-PScriboMessage -IsWarning "$($_.Exception.Message) (DNS Infrastructure Section)" } } end {} } |