How to send a Wake-on-LAN magic packet using PowerShell? - powershell

Question

I want to send a WOL magic packet using PowerShell, without falling back on any third party tools.

Answer 1

Here is the working PowerShell one-liner I am using to send a WakeOnLan packet:
$mac = '01-23-45-67-89-AB'; [System.Net.NetworkInformation.NetworkInterface]::GetAllNetworkInterfaces() | Where-Object { $_.NetworkInterfaceType -ne [System.Net.NetworkInformation.NetworkInterfaceType]::Loopback -and $_.OperationalStatus -eq [System.Net.NetworkInformation.OperationalStatus]::Up } | ForEach-Object { $targetPhysicalAddressBytes = [System.Net.NetworkInformation.PhysicalAddress]::Parse(($mac.ToUpper() -replace '[^0-9A-F]','')).GetAddressBytes(); $packet = [byte[]](,0xFF * 102); 6..101 | Foreach-Object { $packet[$_] = $targetPhysicalAddressBytes[($_ % 6)] }; $client = [System.Net.Sockets.UdpClient]::new([System.Net.IPEndPoint]::new(($_.GetIPProperties().UnicastAddresses | Where-Object { $_.Address.AddressFamily -eq [System.Net.Sockets.AddressFamily]::InterNetwork })[0].Address, 0)); try { $client.Send($packet, $packet.Length,[System.Net.IPEndPoint]::new([System.Net.IPAddress]::Broadcast, 9)) | Out-Null } finally { $client.Dispose() } }
And here is a more readable version:
$mac = '01-23-45-67-89-AB';
[System.Net.NetworkInformation.NetworkInterface]::GetAllNetworkInterfaces() | Where-Object { $_.NetworkInterfaceType -ne [System.Net.NetworkInformation.NetworkInterfaceType]::Loopback -and $_.OperationalStatus -eq [System.Net.NetworkInformation.OperationalStatus]::Up } | ForEach-Object {
$networkInterface = $_
$localIpAddress = ($networkInterface.GetIPProperties().UnicastAddresses | Where-Object { $_.Address.AddressFamily -eq [System.Net.Sockets.AddressFamily]::InterNetwork })[0].Address
$targetPhysicalAddress = [System.Net.NetworkInformation.PhysicalAddress]::Parse(($mac.ToUpper() -replace '[^0-9A-F]',''))
$targetPhysicalAddressBytes = $targetPhysicalAddress.GetAddressBytes()
$packet = [byte[]](,0xFF * 102)
6..101 | Foreach-Object { $packet[$_] = $targetPhysicalAddressBytes[($_ % 6)] }
$localEndpoint = [System.Net.IPEndPoint]::new($localIpAddress, 0)
$targetEndpoint = [System.Net.IPEndPoint]::new([System.Net.IPAddress]::Broadcast, 9)
$client = [System.Net.Sockets.UdpClient]::new($localEndpoint)
try { $client.Send($packet, $packet.Length, $targetEndpoint) | Out-Null } finally { $client.Dispose() }
}
All common MAC address formats are supported and casing doesn't matter, for example:
0123456789aB
01-23-45-67-89-aB
01:23:45:67:89:aB
0123.4567.89aB
Works in powershell.exe (.NET Framework) and pwsh.exe (.NET/.Net Core).
Loosely based on code from Wake on LAN using C#.