Method for unblocking an external computer system in a computer network infrastructure, a distributed computer network having such a computer network infrastructure, and a computer program product

摘要

The method relates to a method for unblocking an external computer system to communicate with a secure processing computer system in a computer network infrastructure. An authentication packet is sent from an external computer system to a broker computer system in the computer network infrastructure. The authentication packet includes signed information for authenticating the external computer system and / or its user. Further, the authentication packet is transmitted by the broker computer system to at least one processing computer system in the computer network infrastructure. The processing computer system keeps a particular network port closed at least temporarily, so that access to the network through this network port is prevented, but the processing computer system is a broker computer system And the authentication packet can be retrieved from the broker computer system. Unblocking the selective network port is later performed by the processing computer system to establish a link to the processing computer system by the external computer system.