Set DNS servers

Set-DNS-DoH.ps1

#Requires -RunAsAdministrator

Write-Output "Update DoH settings ..."

$baseRegistryPath = "HKLM:\SYSTEM\CurrentControlSet\Services\Dnscache\InterfaceSpecificParameters"
if (Test-Path $baseRegistryPath) {
    Remove-Item -Path $baseRegistryPath -Recurse -Force 2>&1 | Out-Null
}

$adapters = Get-NetAdapter -IncludeHidden | Where-Object {$_.Status -ne 'Not Present'}

foreach ($adapter in $adapters) {
    $interfaceGuid = $adapter.InterfaceGuid.ToLower()
    $currentRegistryPath = "$baseRegistryPath\$interfaceGuid\DohInterfaceSettings"

    # IPv4 DoH settings
    $ipv4DohServers = @{
        "1.1.1.1" = "https://cloudflare-dns.com/dns-query";
        "1.0.0.1" = "https://cloudflare-dns.com/dns-query";
        "8.8.8.8" = "https://dns.google/dns-query";
        "8.8.4.4" = "https://dns.google/dns-query"
    }

    foreach ($server in $ipv4DohServers.GetEnumerator()) {
        $path = "$currentRegistryPath\Doh\$($server.Key)"
        New-Item -Path $path -Force 2>&1 | Out-Null
        New-ItemProperty -Path $path -Name "DohTemplate" -Value $server.Value -PropertyType String -Force 2>&1 | Out-Null
        New-ItemProperty -Path $path -Name "DohFlags" -Value 1 -PropertyType Qword -Force 2>&1 | Out-Null
    }

    # IPv6 DoH settings
    $ipv6DohServers = @{
        "2606:4700:4700::1111" = "https://cloudflare-dns.com/dns-query";
        "2606:4700:4700::1001" = "https://cloudflare-dns.com/dns-query";
        "2001:4860:4860::8888" = "https://dns.google/dns-query";
        "2001:4860:4860::8844" = "https://dns.google/dns-query"
    }

    foreach ($server in $ipv6DohServers.GetEnumerator()) {
        $path = "$currentRegistryPath\Doh6\$($server.Key)"
        New-Item -Path $path -Force 2>&1 | Out-Null
        New-ItemProperty -Path $path -Name "DohTemplate" -Value $server.Value -PropertyType String -Force 2>&1 | Out-Null
        New-ItemProperty -Path $path -Name "DohFlags" -Value 1 -PropertyType Qword -Force 2>&1 | Out-Null
    }
}

Write-Output "Update DNS settings ..."

$adapters | Set-DNSClientServerAddress –ServerAddresses ("1.1.1.1", "8.8.8.8", "1.0.0.1", "8.8.4.4") 2>&1 | Out-Null
$adapters | Set-DNSClientServerAddress –ServerAddresses ("2606:4700:4700::1111", "2001:4860:4860::8888", "2606:4700:4700::1001", "2001:4860:4860::8844") 2>&1 | Out-Null
Set-DNSClientServerAddress "Tailscale" –ServerAddresses ("100.100.100.100") 2>&1 | Out-Null
Set-DNSClientServerAddress "Tailscale" –ServerAddresses ("fec0:0:0:ffff::1", "fec0:0:0:ffff::2", "fec0:0:0:ffff::3") 2>&1 | Out-Null

Write-Output "DNS settings have been updated for all network adapters."
ipconfig /all
Read-Host -Prompt "Press any key to continue"