CODEWITHSUNDEEP
powershell
Kade Williams
Kade Williams

Reputation: 1181

How to change DNS servers for all NICS that contain specific ConnectionSpecificSuffix?

I can currently change DNS servers for all NICS on a list of computers.

$computer = gc C:\computerlist.txt

$NICs = Get-WMIObject Win32_NetworkAdapterConfiguration -computername $computer | where { $_.IPEnabled -eq "TRUE"}

ForEach($NIC in $NICs) {
    $DNSServers = "10.1.140.3", "10.1.140.4"  # CHANGE THIS TO THE IP YOU WANT TO USE
    $NIC.SetDNSServerSearchOrder($DNSServers)
    $NIC.SetDynamicDNSRegistration(“TRUE”)
}

How do I only change DNS servers for NICs that are connected to a certain domain name? Some computers may have more than one NIC and I only want to change DNS settings for NICS connected to "mytestdomain.local".

From reading PowerShell examples, it looks like the ConnectionSpecificSuffix shows the domain name. (-ConnectionSpecificSuffix "mytestdomain.local")

Is there a way to edit my script and only change DNS settings for NICs that contain the suffix "mytestdomain.local"?

This doesn't :

$computer = gc C:\computerlist.txt

$NICs = Get-WMIObject Win32_NetworkAdapterConfiguration -computername $computer | where { $_.IPEnabled -eq "TRUE" -and $_.ConnectionSpecificSuffix -eq "mytestdomain.local"}

ForEach($NIC in $NICs) {
    $DNSServers = "10.1.140.3", "10.1.140.4"  # CHANGE THIS TO THE IP YOU WANT TO USE
    $NIC.SetDNSServerSearchOrder($DNSServers)
    $NIC.SetDynamicDNSRegistration(“TRUE”)
}

Upvotes: 1

Views: 1673

Answers (2)

postanote
postanote

Reputation: 16106

There are pre-built scripts to get you to where you are trying to go. Teak them as needed. For example:

Set-DNSServerSearchOrder

At times it is necessary to set the DNS Server Search Order on a machine that is not receiving it's IP from DHCP. This function will allow you to do just that. To verify the current setup of the DNS Server Search Order, you can run the following Get-WmiObject command and select

Download: Set-DNSServerSearchOrder.ps1

# Validate DNS Search order
Get-WmiObject -Class Win32_NetworkAdapterConfiguration -ComputerName "Server01" -Filter "IPEnabled=TRUE" | Select PSComputerName,DNSServerSearchOrder

# or using the DNS cmdlets to first collect the info
(DnsClientGlobalSetting).SuffixSearchList -match $env:USERDNSDOMAIN
Get-DnsClientServerAddress -AddressFamily IPv4 | Select *
(Get-DnsClientServerAddress -AddressFamily IPv4).ServerAddresses

# Modify DNS search order
function Set-DNSServerSearchOrder 
{
    Param
    (
        [Parameter(ValueFromPipeline=$True,ValueFromPipelineByPropertyName=$True)]
        $ComputerName=$Env:ComputerName,
        [String[]]$DNSServers = @("10.10.10.1","10.10.10.2")
    )

    $getWmiObjectSplat = @{
        Filter = "IPEnabled=TRUE"
        ComputerName = $ComputerName
        Class = 'Win32_NetworkAdapterConfiguration'
    }
    $NICs = Get-WmiObject @getWmiObjectSplat

    foreach($NIC in $NICs) 
    {
        $NIC.SetDNSServerSearchOrder($DNSServers) | 
        out-null
    }
}

Looking at / modifying the info using CIM instead. Leverage this...

$nics = [wmiclass]'win32_Networkadapterconfiguration'
[wmiclass]'Win32_NetworkAdapterConfiguration'
$nics.GetMethodParameters("SetDNSSuffixSearchOrder")
$nics | select -ExpandProperty Properties
DNSDomainSuffixSearchOrder
DNSServerSearchOrder


$cimClass = Get-CimClass win32_Networkadapterconfiguration
$cimClass.CimClassMethods
$cimClass.CimClassMethods["SetDNSSuffixSearchOrder"].Parameters
$cimClass.CimClassMethods["EnableDNS"].Parameters
$cimClass.CimClassMethods["EnableDNS"].Qualifiers

Get-WmiObject -Class win32_Networkadapterconfiguration

Upvotes: 1

Lance U. Matthews
Lance U. Matthews

Reputation: 16612

Win32_NetworkAdapterConfiguration instances do not have a ConnectionSpecificSuffix member. They do, however, have DNSDomain and DNSDomainSuffixSearchOrder properties.

Thus, I think what you're looking for is this...

$NICs = Get-WMIObject Win32_NetworkAdapterConfiguration -computername $computer `
    | where { $_.IPEnabled -eq "TRUE" -and $_.DNSDomain -eq "mytestdomain.local" }

Alternatively, if you want to test if the target domain is among any of the search suffixes, regardless of order, then you'd do this...

$NICs = Get-WMIObject Win32_NetworkAdapterConfiguration -computername $computer `
    | where { $_.IPEnabled -eq "TRUE" -and $_.DNSDomainSuffixSearchOrder -contains "mytestdomain.local" }

By the way, this is untested but if your Windows version is new enough you could use the dnsclient module to simplify your code to something like this...

Get-DnsClient -ConnectionSpecificSuffix 'mytestdomain.local' `
    | Set-DnsClientServerAddress -ServerAddresses '10.1.140.3', '10.1.140.4'

It looks like calling Set-DnsClient with the -RegisterThisConnectionsAddress parameter might do the same thing as calling SetDynamicDNSRegistration.

Upvotes: 1

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