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The problem is that Kafka is listening on 127.0.0.1:9092, meaning that it will only accept requests on port 9092 from 127.0.0.1 (localhost), so it is not accessible to Data Collector Edge running on another machine. You need to configure Kafka to listen on another interface, such as 0.0.0.0, so that it is accessible from Edge.

Note - you may need to change more than one Kafka setting. See Kafka Listeners - Explained for a discussion of the various settings in Kafka.