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Vb script to change Static DNS on a list of servers in txt file

Posted on 2010-11-17
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Last Modified: 2012-05-10
Hi,
I need a Vb script or a batch file that will check the server name from a txt file and then change the Preferred DNS and Alternative DNS to new IPs.

I got the script below but, running it doesn’t change DNS or even give errors.
We have a matrix of 2000, 2003 and 2008 servers will be in the txt file
Any ideas?

On Error Resume Next
Dim objFSO : Set objFSO = CreateObject("Scripting.FileSystemObject")
Dim objShell : Set objShell = CreateObject("Wscrfipt.Shell")
Dim objFile : Set objFile = objFSO.OpenTextFile("c:\Computers.txt") 
counter = 1
Do While Not objFile.AtEndOfStream
	currentserver = objFile.ReadLine
	Set objWMIService = GetObject("winmgmts:"  & "{impersonationLevel=impersonate}!\\" & currentserver & "\root\cimv2")
	Set colNicConfigs = objWMIService.ExecQuery  ("SELECT * FROM Win32_NetworkAdapterConfiguration WHERE IPEnabled = True")
 
	For Each objNicConfig In colNicConfigs
		If Not IsNull(objNicConfig.DNSServerSearchOrder) Then
			For Each strDNSServer In objNicConfig.DNSServerSearchOrder
				If strDNSServer = "192.168.20.40" Then
					If counter = 1 Then
						'It's the Primary DNS Server
						objShell.Run "netsh -r " &currentserver &" interface ip delete dnsserver " &chr(34) &"local area connection" &Chr(34) &" 192.168.20.40",1,True
						objShell.Run "netsh -r " &currentserver &" interface ip set dns name=" &chr(34) &"local area connection" &Chr(34) &" static 192.168.20.42",1,True
					ElseIf counter = 2 Then
						'Its the Secondary DNS Server
						objShell.Run "netsh -r " &currentserver &" interface ip delete dnsserver " &chr(34) &"local area connection" &Chr(34) &" 192.168.20.41",1,True
						objShell.Run "netsh -r " &currentserver &" interface ip set dns name=" &chr(34) &"local area connection" &chr(34) &" 192.168.20.43 index=2",1,True				
					End If
				End If				
				counter = counter + 1
			Next
		End If
	Next
Loop

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Question by:rov17
2 Comments
 
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spinzr0 earned 500 total points
ID: 34161830
You should just be able to do it like this
On Error Resume Next
Dim objFSO : Set objFSO = CreateObject("Scripting.FileSystemObject")
Dim objShell : Set objShell = CreateObject("Wscrfipt.Shell")
Dim objFile : Set objFile = objFSO.OpenTextFile("c:\Computers.txt") 
counter = 1
Do While Not objFile.AtEndOfStream
	currentserver = objFile.ReadLine
	Set objWMIService = GetObject("winmgmts:"  & "{impersonationLevel=impersonate}!\\" & currentserver & "\root\cimv2")
	Set colNicConfigs = objWMIService.ExecQuery  ("SELECT * FROM Win32_NetworkAdapterConfiguration WHERE IPEnabled = True")
 
	For Each objNicConfig In colNicConfigs
		If Not IsNull(objNicConfig.DNSServerSearchOrder) Then
	            arrDNSServers = Array("192.168.20.42", "192.168.20.43")
                    objNicConfig.SetDNSServerSearchOrder(arrDNSServers)
		End If
	Next
Loop

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Author Closing Comment

by:rov17
ID: 34169527
Perfect !!
Thanks very much
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