Hi, The problem is most likely that your server certificate doesn't match the hostname of your server (hence the "certificate verify failed" message).
I presume that a.mqtt.broker isn't the proper hostname, but it should match the CN or a subjectAltName in the certificate. > s_client -host a.mqtt.broker ... > 0 s:/C=AB/ST=AB/L=FooBar Land/O=FooBar Ltd/OU=FooBar Security/CN=mqttBroker So this case, assuming you don't have subjectAltName entries in the server your server hostname would have to be mqttBroker. Cheers, Roger -- Mailing list: https://launchpad.net/~mosquitto-users Post to : mosquitto-users@lists.launchpad.net Unsubscribe : https://launchpad.net/~mosquitto-users More help : https://help.launchpad.net/ListHelp
