A system maintains a first computer using a second computer and a central computer by: receiving a request for maintenance from a first computer; opening first and second secured connections to the first and second computers through the central computer; transferring a request for data from the second computer; storing data and a destination instruction sent from the second computer in a central computer buffer; and forwarding the buffered data to the first computer. In response to the request, program can be executed on the first computer for maintenance tasks, as for example: collecting and transmitting data, analysing and repairing configuration, downloading and installing software updates.
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