From c75e3c2928567471c24c06fb1fabb21a75b3603c Mon Sep 17 00:00:00 2001
From: David Morton <jdmorton@live.com>
Date: Thu, 21 Jul 2022 10:05:36 -0500
Subject: [PATCH] Create Start-Portscan.ps1

---
 Start-Portscan.ps1 | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 Start-Portscan.ps1

diff --git a/Start-Portscan.ps1 b/Start-Portscan.ps1
new file mode 100644
index 0000000..b59b3d5
--- /dev/null
+++ b/Start-Portscan.ps1
@@ -0,0 +1,37 @@
+function Start-Portscan{
+    [CmdletBinding()]
+    param (
+        #Variable for network address
+        [Parameter(Mandatory=$true,ValueFromPipeline)]
+        [String[]]
+        $IPAddress,
+
+        #Variable for Port value if defined; otherwise range 1..65535
+        [Parameter(Mandatory=$false, ValueFromPipeline)]
+        [String[]]
+        $Ports
+    )
+
+    $range=1..254
+    $ErrorActionPreference='SilentyContinue'
+    if($null -eq $Ports){
+        $Ports=1..65535
+    }
+    $NetworkAddress=($IPAddress.Split(".")[0..2]) -join(".")
+    foreach($add in $range){
+        $ip="{0}.{1}" -f $NetworkAddress,$add
+        if(Test-Connection -Count 1 -ComputerName $ip){
+            $Ports | ForEach-Object -ThrottleLimit 5 -Parallel{
+                Write-Progress "Scanning Network" $ip -PercentComplete (($_/$Ports.count)*100)
+                $Socket = New-Object System.Net.Sockets.TcpClient($ip, $_)
+                if($Socket.Connected){
+                    Write-Output "$ip port $_ is open."
+                    $Socket.Close()
+                }
+                else{
+                    Write-Output "$ip port $_ is not open."
+                }
+            }
+        }
+    }
+}
\ No newline at end of file