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wake-up-host.ps1
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<#
.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 to 192.168.100.255, UDP port 9 (3x). The device is up in a minute.
.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 to $ipAddr, UDP port $($udpPort) ($($numTimes)x). The device is up in a minute."
exit 0 # success
} catch {
"⚠️ Error in line $($_.InvocationInfo.ScriptLineNumber): $($Error[0])"
exit 1
}