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Creates a report with DNS records stale data
Function Create-DNSScavengingRecordsReport
{
<#The script checks any Dynamic DNS Record and decided whether it’s:
1)A stale record which responded to ping.
2)stale record which doesn’t responded to ping.
3)An updated record (not stale).#>
$DC = (Get-ADDomainController).Name
$DNSRoot = (Get-ADDomain).DNSRoot
$DNSRecords = Get-DnsServerResourceRecord -ComputerName $DC -ZoneName $DNSRoot
$DateThershold = (Get-Date).AddDays(-14)
$DNSArray = @()
ForEach ($DNSRecord in $DNSRecords)
{
If ($DNSRecord.RecordType -eq "A" -and $DNSRecord.Timestamp -ne $Null -and $DNSRecord.Hostname -ne "@" -and $DNSRecord.HostName -ne "DomainDnsZones" -and $DNSRecord.HostName -ne "ForestDnsZones")
{
$Computer = $DNSRecord.HostName
$ComputerIP = $DNSRecord.RecordData.IPv4Address.IPAddressToString
$ComputerOS = "Null"
Try
{
$ADComputer = Get-ADComputer $Computer -Properties OperatingSystem -ErrorAction Stop
$ComputerOS = $ADComputer.OperatingSystem
}
Catch
{
Write-Host "The computer object could not be retreived from Active Directory. Skip." -ForegroundColor yellow
}
$Ping = Test-Connection -ComputerName $DNSRecord.HostName -Count 1 -ErrorAction SilentlyContinue
$DNSObject = New-Object -TypeName PSObject
Add-Member -InputObject $DNSObject -MemberType 'NoteProperty' -Name 'Hostname' -Value $Computer
Add-Member -InputObject $DNSObject -MemberType 'NoteProperty' -Name 'IP' -Value $ComputerIP
Add-Member -InputObject $DNSObject -MemberType 'NoteProperty' -Name 'Timestamp' -Value $DNSRecord.Timestamp
Add-Member -InputObject $DNSObject -MemberType 'NoteProperty' -Name 'OS' -Value $ComputerOS
If (($DNSRecord.Timestamp) -lt $DateThershold)
{
If ($Ping)
{
$Status = "Stale record, responding to ping"
}
Else
{
$Status = "Stale record, NOT responding to ping"
}
}
Else
{
$Status = "Updated record"
}
Add-Member -InputObject $DNSObject -MemberType 'NoteProperty' -Name 'Status' -Value $Status
$DNSArray += $DNSObject
}
}
$DNSArray | Out-GridView -Title "DNS Records - Stale Report for $DNSRoot Zone (Querying $DC DNS Server)"
}
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