Get-DnsRegisteredServers.ps1

1. <# 
2. .SYNOPSIS 
3.     This script gets the reverse lookup zone from a DNS Server and 
4.     displays all the systems registered 
5. .DESCRIPTION 
6.     This script first gets the reverse lookup zone from a DNS Server (i.e. 
7.     all the computers that have used the DNS server to register!). The 
8.     script then displays the FQDN, IP Address and Timestamp. 
9. .NOTES 
10.     File Name  : Get-DnsRegisteredServers.ps1 
11.     Author     : Thomas Lee - tfl@psp.co.uk 
12.     Requires   : PowerShell Version 2.0 
13. .LINK 
14.     This script posted to: 
15.         http://www.pshscripts.blogspot.com 
16.     This script posted to TechNet Scripting Gallery 
17.         http://gallery.technet.microsoft.com/ScriptCenter/en-us/28e8b98e-565b-40be-ba2c-1134341bb555     
18. .EXAMPLE 
19.     PSH [C:\foo]: .Get-DnsRegisteredNames.ps1 
20.     Computers reverse registered on DNS Server: Cookham1 
21.     10.10.1.42      superman.cookham.net.                     3590550 
22.     10.10.1.105     batman.cookham.net.                       3582112 
23.     10.10.1.109     jeeves.cookham.net.                       3586452 
24.     10.10.1.111     supergirl.cookham.net.                    3590550 
25.     10.10.1.114     future.cookham.net.                       3589209 
26.     10.10.1.131     bladerunner.cookham.net.                  3587817 
27.     10.10.1.142     wonderwoman.kapoho.net.                   3590551 
28. #> 
29.  
30. $dns = "Cookham1"  
31. $records = get-wmiobject -class MicrosoftDNS_PTRType -namespace root\MicrosoftDNS -computer $dns  
32.  
33. "Computers reverse registered on DNS Server: $DNS" 
34.  
35. # Loop through and display results 
36. foreach ($record in $records) { 
37.  
38. # Get owner name and ip address string 
39. $on = $record.ownerName.split(".") 
40. $ownerip = $on[3] + "." + $on[2] + "." + $on[1] + "." + $on[0] 
41.  
42. # Display details 
43. "{0, -15} {1,-40}  {2,-10} " -f $ownerip, $record.ptrdomainname, $record.timestamp 
44. } 

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