'Close a VNC server to the provided node.
:param node: Node to close the VNC tunnel to.
:type node: :class:`libcloud.compute.base.Node`
:return: ``True`` on success, ``False`` otherwise.
:rtype: ``bool``'

def ex_close_vnc_tunnel(self, node):

    path = ('/servers/%s/action/' % node.id)
    response = self._perform_action(path=path, action='close_vnc', method='POST')
    return (response.status == httplib.ACCEPTED)
