Set DNS on all network adapters

# PowerShell Script to Set DNS Servers on All Network Adapters and Validate Them
# Save this file as SetDNS.ps1

# Ensure the script runs as Administrator
if (-not ([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator)) {
    Write-Host "`nAttempting to relaunch with administrative privileges..." -ForegroundColor Yellow
    Start-Sleep -Seconds 2
    Start-Process powershell.exe -ArgumentList "-NoProfile -ExecutionPolicy Bypass -File `"$PSCommandPath`"" -Verb RunAs
    exit
}

# Set execution policy temporarily to unrestricted
Set-ExecutionPolicy -ExecutionPolicy Unrestricted -Scope Process -Force

# Display script information and ask for user confirmation to proceed
Write-Host "`nThis script will change the DNS settings based on the Ultimate Hosts Blacklist to protect against malicious actors." -ForegroundColor Cyan
Write-Host "For more details, visit the GitHub page: https://github.com/Ultimate-Hosts-Blacklist/Ultimate.Hosts.Blacklist" -ForegroundColor Cyan
Start-Sleep -Seconds 2

Write-Host "`nDNS servers to be set:"
Write-Host "IPv4 Primary:   88.198.70.38" -ForegroundColor Yellow
Write-Host "IPv4 Secondary: 88.198.70.39" -ForegroundColor Yellow
Write-Host "IPv6 Primary:   2a01:4f8:140:5021::38" -ForegroundColor Yellow
Write-Host "IPv6 Secondary: 2a01:4f8:140:5021::39`n" -ForegroundColor Yellow

$confirmation = Read-Host "Do you want to proceed with setting these DNS servers? (Y/N)"
if ($confirmation -ne 'Y') {
    Write-Host "`nOperation cancelled by user. No changes made.`n" -ForegroundColor Red
    exit
}

# DNS server addresses
$IPv4PrimaryDNS = "88.198.70.38"
$IPv4SecondaryDNS = "88.198.70.39"
$IPv6PrimaryDNS = "2a01:4f8:140:5021::38"
$IPv6SecondaryDNS = "2a01:4f8:140:5021::39"

# Apply DNS settings to all network adapters
Write-Host "`nApplying new DNS values to all network adapters..." -ForegroundColor Green
Get-NetAdapter | ForEach-Object {
    Set-DnsClientServerAddress -InterfaceIndex $_.ifIndex -ServerAddresses $IPv4PrimaryDNS, $IPv4SecondaryDNS, $IPv6PrimaryDNS, $IPv6SecondaryDNS
}
Start-Sleep -Seconds 2

# Flush DNS to ensure new settings are used immediately
Write-Host "`nFlushing DNS cache to ensure new settings are active..." -ForegroundColor Green
ipconfig /flushdns
Start-Sleep -Seconds 2

# Validate the DNS settings applied
Write-Host "`nValidating the applied DNS settings:" -ForegroundColor Green
$adapters = Get-NetAdapter | Where-Object { $_.Status -eq "Up" }
foreach ($adapter in $adapters) {
    $dnsSettingsIPv4 = (Get-DnsClientServerAddress -InterfaceIndex $adapter.ifIndex -AddressFamily IPv4).ServerAddresses
    $dnsSettingsIPv6 = (Get-DnsClientServerAddress -InterfaceIndex $adapter.ifIndex -AddressFamily IPv6).ServerAddresses
    Write-Host "Adapter: $($adapter.Name)"
    Write-Host "IPv4 DNS: $($dnsSettingsIPv4 -join ', ')"
    Write-Host "IPv6 DNS: $($dnsSettingsIPv6 -join ', ')"
}
Start-Sleep -Seconds 2

# Confirm the DNS settings applied
Write-Host "`nDNS settings have been successfully set and verified on active adapters:" -ForegroundColor Green
Write-Host "IPv4 Primary DNS: $IPv4PrimaryDNS"
Write-Host "IPv4 Secondary DNS: $IPv4SecondaryDNS"
Write-Host "IPv6 Primary DNS: $IPv6PrimaryDNS"
Write-Host "IPv6 Secondary DNS: $IPv6SecondaryDNS"

# Wait for user to read the output before exiting
Write-Host "`nPress any key to exit..." -ForegroundColor White
$host.UI.RawUI.ReadKey("NoEcho,IncludeKeyDown")