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Change DNS using Powershell

Hi there.

I've managed to find the attached powershell script that allows me to change dns setting on a server.

If works fine except that i can only add two addresses.

I'm looking to add more than that within the advanced setting on the nic.  how do i go about this?
FUNCTION Set-DNSWINS {
#Get NICS via WMI
$Nics = get-WMIObject -class Win32_NetworkAdapterConfiguration -ComputerName $_ -Filter "IPEnabled=TRUE"

foreach ($NIC in $NICs){
$DNSSERVERS = "xxx.xxx.xxx.xxx","xxx.xxx.xxx.xxx"
$NIC.SetDNSServerSearchOrder($DNSServers)
$NIC.SetDynamicDNSRegistration("True")
$NIC.SetWINSServer.count("xxx.xxx.xxx.xxx","xxx.xxx.xxx.xxx") 
}
}

function Get-filename{
$computer = "e:\Txt_Files\dns.txt"
return $Computer
}

$f = Get-Filename
get-content $f | foreach {set-DNSWINS}

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Colchester_Institute
Asked:
Colchester_Institute
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1 Solution
 
Chris DentPowerShell DeveloperCommented:

Hmm why do you think you can only set two?

This should work:
$DNSServers = "1.2.3.4", "2.3.4.5", "3.4.5.6"
$NIC.SetDNSServerSearchOrder($DNSServers)

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There's no reason to limit the number there to two.

Chris
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Colchester_InstituteAuthor Commented:
ahh yes that works...

it was my own fault also where i'd played around with the syntax

it doesnt however let me put more than two wins addresses in...is there a way out of curiosity i can do that?
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Chris DentPowerShell DeveloperCommented:

Unfortunately the SetWINSServer method is a bit limited, NetSh should be able to do it, but I can't seem to get the syntax right for more than one address.

The last resort is hitting the registry, WINS addresses hide here:

HKLM:\System\CurrentControlSet\services\NetBT\parameters\Interfaces\Tcpip_<YourInterface>

There's a NameServerList beneath that. We can set that like this:
$DnsServers = "xxx.xxx.xxx.xxx","xxx.xxx.xxx.xxx", "xxx.xxx.xxx.xxx"
[String[]]$WinsServers = "yyy.yyy.yyy.yyy", "yyy.yyy.yyy.yyy", "yyy.yyy.yyy.yyy"

Get-WmiObject Win32_NetworkAdapterConfiguration -Filter "IPEnabled=$True" | ForEach-Object {
  $_.SetDNSServerSearchOrder($DNSServers)
  $_.SetDynamicDNSRegistration($True)

  Set-ItemProperty -Path "HKLM:\System\CurrentControlSet\services\NetBT\parameters\Interfaces\Tcpip_$($_.SettingID)" `
    -Name "NameServerList" -Value $WinsServers
}

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Note that we have to force $WinsServers to be a String array (String[]) or it'll tell us to get lost.

A bit more convoluted that I prefer, but it should work :)

HTH

Chris
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Colchester_InstituteAuthor Commented:
why thank

my manager has said hes not fussed bout the wins but it was for my own learning curve.
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