<# .SYNOPSIS Wakes up a computer using Wake-on-LAN .DESCRIPTION This PowerShell script sends a magic UDP packet to a computer to wake him up (requires the target computer to have Wake-on-LAN activated). .PARAMETER macAddr Specifies the host's MAC address (e.g. 11:22:33:44:55:66) .PARAMETER ipAddr Specifies the subnet address (e.g. 192.168.178.255) .PARAMETER udpPort Specifies the UDP port (9 by default) .PARAMETER numTimes Specifies # of times to send the packet (3 by default) .EXAMPLE PS> ./wake-up-host.ps1 11:22:33:44:55:66 192.168.100.255 ✅ Sent magic packet 3 times to subnet 192.168.100.255, UDP port 9. NOTE: wait a minute until the computer fully boots up. .LINK https://github.com/fleschutz/PowerShell .NOTES Author: Markus Fleschutz | License: CC0 #> param([string]$macAddr = "", [string]$ipAddr = "", [int]$udpPort = 9, [int]$numTimes = 3) function Send-WOL { param([string]$macAddr, [string]$ipAddr, [int]$udpPort) $broadcastAddr = [Net.IPAddress]::Parse($ipAddr) $macAddr = (($macAddr.replace(":","")).replace("-","")).replace(".","") $target = 0,2,4,6,8,10 | % {[convert]::ToByte($macAddr.substring($_,2),16)} $packet = (,[byte]255 * 6) + ($target * 16) $UDPclient = New-Object System.Net.Sockets.UdpClient $UDPclient.Connect($broadcastAddr, $udpPort) [void]$UDPclient.Send($packet, 102) } try { if ($macAddr -eq "" ) { $macAddr = Read-Host "Enter the host's MAC address, e.g. 11:22:33:44:55:66" } if ($ipAddr -eq "" ) { $ipAddr = Read-Host "Enter the subnet address, e.g. 192.168.178.255" } for ($i = 0; $i -lt $numTimes; $i++) { Send-WOL $macAddr.Trim() $ipAddr.Trim() $udpPort Start-Sleep -milliseconds 100 } "✅ Sent magic packet $numTimes times to subnet $ipAddr, UDP port $($udpPort)." " NOTE: wait a minute until the computer fully boots up." exit 0 # success } catch { "⚠️ Error in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])" exit 1 }