Port Availability Check

This script checks if a specified port is open on a given list of devices. You can use this for port monitoring and to ensure critical applications are accessible on the specified ports.

# List of devices and ports to check
$devices = @("192.168.1.1", "192.168.1.2")  # Replace with IPs/hostnames
$port = 80  # Change to the port number you want to check

foreach ($device in $devices) {
    $tcpConnection = New-Object System.Net.Sockets.TcpClient
    try {
        $tcpConnection.Connect($device, $port)
        Write-Output "Port $port on $device is open."
    } catch {
        Write-Output "Port $port on $device is closed or unreachable."
    } finally {
        $tcpConnection.Close()
    }
}

• Modify $devices array with your list of IP addresses or hostnames.

• Explanation: This script attempts to establish a TCP connection on the specified port and reports whether it’s open.