CPC H04L 67/34 (2013.01) | 28 Claims |
27. A proxy system arranged between a target network of an industrial plant and a source network, the proxy system comprising:
a gateway component operatively connected to the source network; and
a proxy component operatively connected to at least one computing unit of the target network of the industrial plant, the proxy component comprising a plug-in configured to:
read entries from a target-network-internal information structure, wherein each entry in each case characterizes a software artifact that can be downloaded when authorization is granted by an operator of the target network of the industrial plant,
receive requests from the target network of the industrial plant to the source network relating to the availability of new software artifacts on behalf of the source network,
search, for each request, for at least one entry that matches the request in the target-network-internal information structure, and
when the at least one matching entry is present in the target-network-internal information, retrieve the software artifact characterized in the at least one entry that matches the request and set up a connection in just one direction, namely from the target network of the industrial plant to the source network, and to disconnect the connection after the software artifact is retrieved, and
when the at least one matching entry is not present in the target-network-internal information structure, block the request.
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