The MQTT broker has 4 Ethernet interfaces with up to 100 MBit. Configuration takes place entirely via the web interface. Depending on the application, the MQTT Broker can be configured in two operating modes: "Switch" and "Firewall". If the MQTT Broker is to store and distribute the MQTT messages within a closed machine network, all 4 Ethernet connections in the same IP subnet can be used. In "Switch" operating mode, the MQTT broker can be accessed via an IP address.