Merge pull request #25 from sawft99/sawft99-patch-1

Update DNSDupCheck.ps1

DNSDupCheck.ps1

@@ -1,20 +1,40 @@
-#Find duplicate dns entries
+#Find duplicate DNS entries
 
 $Domain = 'example.com'
 $DNSServer = 'MyDNSServer'
+$IncludeStaticRecords = $false
 
 Clear-Host
 
-#All A records, excluding static and some other special ones
-$ARecords = Get-DnsServerResourceRecord -ComputerName $DNSServer -ZoneName $Domain -RRType A | Where-Object {($_.Timestamp -ne $null) -and ($_.HostName -ne '@') -and ($_.HostName -notmatch 'DnsZones') -and ($_.Hostname -notmatch $Domain)} | Select-Object -Property HostName,Timestamp,RecordData 
+Write-Host '
+=====================
+DNS Duplicate Records
+====================='
+
+#All A records, excluding some special ones
+if ($IncludeStaticRecords -eq $false) {
+    $ARecords = Get-DnsServerResourceRecord -ComputerName $DNSServer -ZoneName $Domain -RRType A | Where-Object {($_.Timestamp -ne $null) -and ($_.HostName -ne '@') -and ($_.HostName -notmatch 'DnsZones') -and ($_.Hostname -notmatch $Domain)} | Select-Object -Property HostName,Timestamp,RecordData
+} elseif ($IncludeStaticRecords -eq $true) {
+    $ARecords = Get-DnsServerResourceRecord -ComputerName $DNSServer -ZoneName $Domain -RRType A | Where-Object {($_.HostName -ne '@') -and ($_.HostName -notmatch 'DnsZones') -and ($_.Hostname -notmatch $Domain)} | Select-Object -Property HostName,Timestamp,RecordData
+} else {
+    Write-Host ''
+    Write-Host -ForegroundColor Red '$IncludeStaticRecords needs to be $true or $false'
+    exit 2
+}
 
 #Create table with Name, timestamp, and IPv4 address
 $ARecordsFormatted = $ARecords | Select-Object -Property HostName, Timestamp, @{Name='IPv4Address'; Expression={$_.RecordData.IPv4Address}}
 
-#Group based on IP and only when the same IP is seen more than 2 times
+#Group based on IP and only when the same IP is seen more than 1 time
 $DuplicateNames = ($ARecordsFormatted | Group-Object -Property IPv4Address) | Where-Object -Property Count -gt 1
 
 #Create table again and sort from least duplicates to most
 $Final = $DuplicateNames | Select-Object Count, @{Name='IPv4Address'; Expression={$_.Name}},@{Name='HostNames'; Expression={$_.Group.HostName -join ', '}} | Sort-Object -Property Count
 
-$Final
+if ($null -ne $Final) {
+    $Final
+} else {
+    Write-Host ''
+    Write-Host -ForegroundColor Green 'No duplicate records
+    '
+}