Get-WMIObject Win32_NetworkAdapterConfiguration - 循环通过每个 NIC 的 X 个 DNS 服务器

Question

对于一组计算机，我想连接每台计算机，枚举每个具有真实 IP 的 NIC，并且对于每个 NIC，我想循环通过每个 DNS 服务器（第一、第二、第三、第四、第五等）如果它包含特定的 IP（例如 8.8.8.8），我想在不影响任何其他 DNS 服务器的情况下替换它（用 7.7.7.7）。我如何为 X 数量的 DNS 服务器执行此操作，而无需一次执行每个服务器条目（就像我在下面对前 3 个所做的那样）并同时更改它。

$computer ='wrk-01'
$NICs     = Get-WMIObject Win32_NetworkAdapterConfiguration -computername $computer | 
            where{$_.IPEnabled -eq "TRUE"}

Foreach($NIC in $NICs) {

  #  $DNSServerCount = $Nic.DNSServerSearchOrder.Count
  #  $DNSServerArray = @($nic.DNSServerSearchOrder[$DNSServerCount - $DNSServerCount,$DNSServerCount - $DNSServerCount + 1,$DNSServerCount - $DNSServerCount + 2])
   # write-host $nic.description
 #   write-host $nic.PSComputerName $DNSServerArray

    if($nic.dnsserversearchorder[0] -like "8.8.8.8"){   
    write-host "matched 8.8.8.8 at position 0"
    $NIC.SetDNSServerSearchOrder(@("7.7.7.7", $nic.dnsserversearchorder[1], $nic.dnsserversearchorder[2]))
    }

    if($nic.dnsserversearchorder[1] -like "8.8.8.8"){   
    write-host "matched 8.8.8.8 at position 1"
    $NIC.SetDNSServerSearchOrder(@($nic.dnsserversearchorder[0],"7.7.7.7", $nic.dnsserversearchorder[2]))
    }

        if($nic.dnsserversearchorder[2] -like "8.8.8.8"){   
    write-host "matched 8.8.8.8 at position 2"
    $NIC.SetDNSServerSearchOrder(@($nic.dnsserversearchorder[0], $nic.dnsserversearchorder[1],"7.7.7.7"))
    }

}

Answer 1

这是检查和更新是否匹配的一种方法。一旦找到匹配项，它将用期望的替换替换任何匹配行，否则输出，收集的列表然后设置为新的 DNS 服务器。如果没有匹配，它将继续到下一个 nic。

$computer ='wrk-01'
$NICs = Get-WMIObject Win32_NetworkAdapterConfiguration -computername $computer | 
            where{$_.IPEnabled -eq "TRUE"}

Foreach($NIC in $NICs)
{
    $DNSIPs = $nics.DNSServerSearchOrder
    if($DNSIPs -contains '8.8.8.8')
    {
        Write-Host "Match found... updating" -ForegroundColor Green
        $NewDNS = $DNSIPs | foreach {
            $_ -replace '8.8.8.8','7.7.7.7'
        }
        $null = $NICs.SetDNSServerSearchOrder($NewDNS)
    }
}

一个可能会让您头疼的建议是不要使用复数变量名，而是使用这样的描述性名称。

$computer ='wrk-01'
$NICList = Get-WMIObject Win32_NetworkAdapterConfiguration -computername $computer | 
            where{$_.IPEnabled -eq "TRUE"}

Foreach($NIC in $NICList)
{
    $DNSIPList = $nics.DNSServerSearchOrder
    if($DNSIPList -contains '8.8.8.8')
    {
        Write-Host "Match found... updating" -ForegroundColor Green
        $NewDNS = $DNSIPList | foreach {
            $_ -replace '8.8.8.8','7.7.7.7'
        }
        $null = $NICs.SetDNSServerSearchOrder($NewDNS)
    }
}