Mqtt broker and client?

[jyijyi]

here says local broker is OK:

How to use component 3rdParty paho.mqtt.c

it worked very well with the local broker (192.168.2.3) but when trying to use a remote broker on the internet, I get the following error: URL: tcp://mqtt.dioty.co:1883 ========================================================= Feb 19 10:45:31 fx30s user.info Legato: INFO | mqttClientService[4328] | Trace Output Feb 19 10:45:31 fx30s user.info Legato: INFO | mqttClientService[4328] | Product name: Eclipse Paho Synchronous MQTT C Client Library Feb 19 10:45:31 fx30s user.inf…