Enter in the IP, CNAME, or a wildcard search string in $iplist to look in ALL Route 53 Hosted Zones. #Utility #Inventory #Route_53 #AWS #Public

search_rt53_entries_for_IP.ps1

#search_rt53_entries_for_IP.ps1
#Enter in the IP, CNAME, or a wildcard search string in $iplist to look in ALL Route 53 Hosted Zones.
#Version: 1.5
#Date Created: 10/19/2020
#Date Updated: 9/14/2022
#Created: Ed Walsh
#
#
#Use this to check PoSh version and save to correct location for cvs outputs.
$timestamp = get-date -format yyyyMMddHHmmss
$subfolder = if (($PSVersionTable.PSEdition) -eq "Core") { if ( $True -eq $iswindows ) { "\Documents\" } Else { "" } } Else {"\Documents\"}
$mydocuments = $home + $subfolder #Old Way of doing it# [environment]::getfolderpath("mydocuments")
$fileName = "RT53-Zones-Entries-Search-Inventory-"+ [string]$timestamp + ".csv"
$filePath = Join-Path $mydocuments $fileName

#To only search in one HostedZone and not all, enter in the Domain. To check all HostedZones enter in ""
$Domain = ""

# List out the RT53 Target IP's or urls to search for, Can be a comma seperated list. NOTE, if you search for an IP make sure you also include the AWS internal IP URL, example: "192.165.21.75","ip-192-165-21-75.ec2.internal"
$iplist =  "dualstack.ext-prod-1216304511.us-west-1.elb.amazonaws.com", "grand.website.com.edgesuite.net","smart.website.com.edgesuite.net","192.165.21.75","ip-192-165-21-75.ec2.internal"
						

$a = @()
$B = @()
$rt53out = @()
Import-Module AWSPowerShell 
 
$zones = Get-R53HostedZones 
  
foreach ($zone in $zones) { 
    $rt53out += if ($Domain -eq "" -or $zone.Name -eq "$Domain.") { 
        $zname = $zone.Name
        $(Get-R53ResourceRecordSet -HostedZoneId $($zone.Id)).ResourceRecordSets  | Where-object { ($_.Type -eq "A" -or $_.Type -eq "CNAME") -and $_.Name -notlike "*_domainkey*" }   | Select-Object @{Name = 'RT53_Zone'; Expression = { $zname.Substring(0, $zname.Length - 1) } }, @{Name = 'URL'; Expression = { $_.Name.Substring(0, $_.Name.Length - 1) } }, Type, @{Name = 'Value'; Expression = { if ($_.AliasTarget -ne $null) { (($_.AliasTarget).DNSName).TrimEnd(".") } Else { ($_.ResourceRecords | Select-Object -ExpandProperty Value).TrimEnd(".") } } }
    } 
}


foreach ($ipsearch in $iplist){
foreach ($zvalue in $rt53out) {

      $a +=  if (($zvalue).Value -like $ipsearch ) {
            [PsCustomObject][ordered]@{
     
           'Domains_Searched' = if($domain -eq ""){'All Domains'} Else {$domain}
           'Has_Entry' = 'Yes'
           'Rt53_Zone' = ($zvalue.RT53_zone)
           'Type' =  ($zvalue.Type)
            'URL' = ($zvalue.url) 
            'Value' = ($zvalue.value)
            
            }
                                            }
           
    
}
 $B +=   if(-not( $a )) { 
            [PsCustomObject][ordered]@{
     
           'Domains_Searched' = if($domain -eq ""){'All Domains'} Else {$domain}
           'Has_Entry' = 'No'
           'Rt53_Zone' = "" 
           'Type' =  ""
            'URL' = "" 
            'Value' = $ipsearch
            
            }
            }
            Else {
            $A
            }

$A = @()
} 

$B | Out-GridView
$b | Export-Csv -NoTypeInformation -Append -Path $filepath

Write-Output "Exported to:  $filePath"
 Write-Output "\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\|||||||////////////////////////////////////"

Handy script if you have a lot of RT53 HostedZones in AWS and need to look in each for the Target of the entries.
When the Akamai DNS outage hit on 7/22/2021, was able to scan for edgesuite entries and find all of my entries across all my HostedZones.

8/9/2021: Version 1.4
Fixed the issue where if it was an Alias record the value returned nothing. You need to check for Alias and then return specific records for Value.