EMQX

EMQX at a glance

EMQX is a widely used open-source, highly scalable MQTT broker for IoT, handling large numbers of connected devices. EMQX ships regular releases plus security fixes; as a broker that can control devices and often bridges untrusted networks, hardening and keeping it current matter.

For admins the security fundamentals mirror any MQTT broker but at scale: enable authentication and TLS, set fine-grained access control on topics, and never expose an unauthenticated broker to the internet — an open broker leaks data and can let anyone control connected devices. EMQX runs clustered for scale; upgrade nodes carefully and back up configuration first. Its dashboard and API belong on a protected network behind authentication. Because MQTT often drives physical actuators, treat access seriously. After updating, verify that clients connect, authenticate and messages flow across the cluster. Check plugin and rule-engine compatibility across versions. Track the version and its support window; patchletter surfaces new EMQX releases.