List established IPs and ports with DNS resolved names and program names

list_established_ports.ps1

# List established IPs and ports with DNS resolved names and program names
$nfo = @()

ForEach ($c in Get-NetTCPConnection -State Established) {
  if ($c.LocalAddress -eq $c.RemoteAddress) {
    # skip same IP's
    Continue
  }

  $prog = (Get-Process -Id $c.OwningProcess)

  try {
    # Try to resolve IP to host name
    $r = [System.Net.Dns]::GetHostEntry($c.RemoteAddress).HostName
  } catch {
    $r = "-"
  }

  $nfo += New-Object PSObject -Property @{
    LocalAddress = $c.LocalAddress
    LocalPort = $c.LocalPort
    RemoteHost = $r
    RemoteAddress = $c.RemoteAddress
    RemotePort = $c.RemotePort
    ProcName = $prog.Name
    ProcPath = $prog.Path
    ProcProduct = $prog.Product
    PID = $c.OwningProcess
  }
}

$nfo | Select -ErrorAction SilentlyContinue RemoteAddress, RemotePort, RemoteHost, LocalAddress, LocalPort, ProcProduct, PID, ProcPath, * | Sort PID,RemoteAddress,RemotePort | Format-Table