old_contents: from twisted.internet import endpoints, reactor
  from txampext.multiplexing import ProxyingFactory
  
  
  def connectProxy(namespace, identifier, _reactor=reactor):
      """Start listening on some free local port; connections will be
      proxied to the virtual server with the given identifier.
  
      """
      remote = namespace.get("remote")
      if remote is None:
          raise RuntimeError("You are not connected to the exercise server. "
                             "Call ``connect``.")
  
      factory = ProxyingFactory(remote, identifier)
      endpoint = endpoints.TCP4ServerEndpoint(_reactor, 0, interface="localhost")
      d = endpoint.listen(factory)
      d.addCallback(_listening, namespace, identifier)
      return None
  
  
  def _listening(listeningPort, namespace, identifier):
      """Started listening; report success to terminal.
  
      """
      host = listeningPort.getHost()
      template = "{id} is now listening on {h.host}:{h.port}"
      namespace["manhole"].writeLine(template.format(h=host, id=identifier))
  
new_contents: from stanczyk.util import _getRemote
  from twisted.internet import endpoints, reactor
  from txampext.multiplexing import ProxyingFactory
  
  
  def connectProxy(namespace, identifier, _reactor=reactor):
      """Start listening on some free local port; connections will be
      proxied to the virtual server with the given identifier.
  
      """
      endpoint = endpoints.TCP4ServerEndpoint(_reactor, 0, interface="localhost")
      factory = ProxyingFactory(_getRemote(namespace), identifier)
      d = endpoint.listen(factory)
      d.addCallback(_listening, namespace, identifier)
      return None
  
  
  def _listening(listeningPort, namespace, identifier):
      """Started listening; report success to terminal.
  
      """
      host = listeningPort.getHost()
      template = "{id} is now listening on {h.host}:{h.port}"
      namespace["manhole"].writeLine(template.format(h=host, id=identifier))
  
subject: Use the new fancy refactored remote logic