var wbemFlagReturnImmediately = 0x10;
var wbemFlagForwardOnly = 0x20;

  var objWMIService = GetObject("winmgmts:\\\\.\\root\\CIMV2");
  var colItems = objWMIService.ExecQuery("SELECT * FROM Win32_Proxy", "WQL",
                     wbemFlagReturnImmediately | wbemFlagForwardOnly);

  var enumItems = new Enumerator(colItems);
  for (; !enumItems.atEnd(); enumItems.moveNext()) {
   var objItem = enumItems.item();

   WScript.Echo("Caption: " + objItem.Caption);
   WScript.Echo("Description: " + objItem.Description);
   WScript.Echo("Proxy Port Number: " + objItem.ProxyPortNumber);
   WScript.Echo("Proxy Server: " + objItem.ProxyServer);
   WScript.Echo("Server Name: " + objItem.ServerName);
   WScript.Echo("Setting ID: " + objItem.SettingID);
   WScript.Echo();
  }