The server for MQTT is mqtt.mediumone.com. There are four port numbers: one for standard non-encrypted MQTT, one for encrypted MQTT, one for unencrypted MQTT over websockets and one for encrypted MQTT over websockets.
|Pro port number|
|Unencrypted MQTT over WebSockets||61627|
|Encrypted MQTT over WebSockets||61628|
It is recommended that if at all possible, that the encrypted ports be used. Otherwise, user information like passwords can be seen in the cleartext.