PowerShell Scripts Blog: MicrosoftDNS

Thursday, 12 August 2010

<#
.SYNOPSIS
This script gets the reverse lookup zone from a DNS Server and
displays all the systems registered
.DESCRIPTION
This script first gets the reverse lookup zone from a DNS Server (i.e.
all the computers that have used the DNS server to register!). The
script then displays the FQDN, IP Address and Timestamp.
.NOTES
File Name : Get-DnsRegisteredServers.ps1
Author : Thomas Lee - tfl@psp.co.uk
Requires : PowerShell Version 2.0
.LINK
This script posted to:
http://www.pshscripts.blogspot.com
This script posted to TechNet Scripting Gallery
http://gallery.technet.microsoft.com/ScriptCenter/en-us/28e8b98e-565b-40be-ba2c-1134341bb555
.EXAMPLE
PSH [C:\foo]: .Get-DnsRegisteredNames.ps1
Computers reverse registered on DNS Server: Cookham1
10.10.1.42 superman.cookham.net. 3590550
10.10.1.105 batman.cookham.net. 3582112
10.10.1.109 jeeves.cookham.net. 3586452
10.10.1.111 supergirl.cookham.net. 3590550
10.10.1.114 future.cookham.net. 3589209
10.10.1.131 bladerunner.cookham.net. 3587817
10.10.1.142 wonderwoman.kapoho.net. 3590551
#>
$dns = "Cookham1"
$records = get-wmiobject -class MicrosoftDNS_PTRType -namespace root\MicrosoftDNS -computer $dns
"Computers reverse registered on DNS Server: $DNS"
# Loop through and display results
foreach ($record in $records) {
# Get owner name and ip address string
$on = $record.ownerName.split(".")
$ownerip = $on[3] + "." + $on[2] + "." + $on[1] + "." + $on[0]
# Display details
"{0, -15} {1,-40} {2,-10} " -f $ownerip, $record.ptrdomainname, $record.timestamp
}