Added scan-ports.ps1

README.md

@@ -25,6 +25,7 @@ The following PowerShell scripts can be found in the `Scripts/` subfolder:
 * [poweroff.ps1](Scripts/poweroff.ps1) - halts the local computer, administrator rights might be needed
 * [news.ps1](Scripts/news.ps1) - prints the latest news
 * [reboot.ps1](Scripts/reboot.ps1) - reboots the local computer, administrator rights might be needed
+* [scan-ports.ps1](Scripts/scan-ports.ps1) - scans the network for open/closed ports
 * [send-email.ps1](Scripts/send-email.ps1) - sends an email message
 * [send-udp.ps1](Scripts/send-udp.ps1) - sends a UDP datagram message to the given IP address and port
 * [SHA1.ps1](Scripts/SHA1.ps1) - prints the SHA1 checksum of the given file

Scripts/scan-ports.ps1

@@ -0,0 +1,27 @@
+#!/snap/bin/powershell
+
+# Syntax:       ./scan-ports.ps1
+# Description:	scans the network for open/closed ports
+# Author:	Markus Fleschutz
+# Source:	github.com/fleschutz/PowerShell
+# License:	CC0
+
+$network = "192.168.178"
+$port = 8000
+$range = 1..254
+$ErrorActionPreference= "silentlycontinue"
+
+foreach ($add in $range) {
+	$ip = "{0}.{1}" -F $network,$add
+	Write-Progress "Scanning Network" $ip -PercentComplete (($add/$range.Count)*100)
+	if (Test-Connection -BufferSize 32 -Count 1 -quiet -ComputerName $ip) {
+		$socket = new-object System.Net.Sockets.TcpClient($ip, $port)
+		if ($socket.Connected) {
+			write-host "$ip port $port open"
+			$socket.Close()
+		} else {
+			write-host "$ip port $port not open"
+		}
+	}
+}
+exit 0