That’s not right. The MQTT2 binding comes with a broker functionality but it’s not mosquitto.
So if you run openHAB >=2.4 with the mqtt binding it’ll use the same port that mosquitto would use but cannot. openHABian on the other hand provides a mosquitto bundle. @Ariel_Pena if you run on Raspi (I guess you do if you run Raspbian) you should consider moving to openHABian.
And please follow this on your next post
