Get-PortInfo.ps1

Get-PortInfo.ps1

function Get-PortInfo {
    param(
        [Parameter(Mandatory)]
        [int]$Port,
        [switch]$Kill
    )

    # Find TCP connections on the specified port
    $connections = Get-NetTCPConnection -LocalPort $Port -ErrorAction SilentlyContinue

    if (-not $connections) {
        Write-Host "Port $Port is free" -ForegroundColor Green
        return
    }

    # Show all connections on that port (there may be multiple)
    Write-Host "Connections on port $Port" -ForegroundColor Cyan
    $connections | Format-Table LocalAddress, LocalPort, RemoteAddress, RemotePort, State, OwningProcess -AutoSize

    # Keep only those in LISTEN state
    $procId = ($connections | Where-Object State -eq 'Listen').OwningProcess | Select-Object -First 1

    if (-not $procId) {
        Write-Host "No process is listening on port $Port" -ForegroundColor Yellow
        return
    }

    Write-Host "Listening PID: $procId" -ForegroundColor Yellow

    # Process name and executable path
    Write-Host "`nProcess" -ForegroundColor Cyan
    Get-Process -Id $procId -ErrorAction SilentlyContinue |
    Select-Object Id, ProcessName, Path |
    Format-List

    # Full command line, same as Task Manager > Command line
    Write-Host "Command line" -ForegroundColor Cyan
    Get-CimInstance Win32_Process -Filter "ProcessId = $procId" |
    Format-List ProcessId, Name, CommandLine

    # Kill switch: terminate the process if -Kill is passed
    if ($Kill) {
        Write-Host "Killing process $procId..." -ForegroundColor Red
        Stop-Process -Id $procId -Force
        Write-Host "Process $procId terminated" -ForegroundColor Green
    }
}