Abstract: The invention provides for a method for providing access to a web server and an arrangement for performing said method. Access is provided by a first proxy server and a second proxy server on request.

Abstract: The invention provides for an arrangement for operating a technical installation comprising a number of machines, the arrangement comprises a control structure, the control structure being adapted for generating a schedule for sending requests to the machines by means of a simulation and in consideration of expectation values of the machines, for monitoring the operation achieved by switching of the machines, wherein switching of the machines is performed by the machines themselves, in order to achieve a template illustrating the switching of the machines, and for comparing the generated schedule with the template.