Security Settings Tab

On this tab, you make the settings for secure connections and user authentication for MQTT source systems.

To be able to identify the PCo system as a client to the MQTT server and vice versa, X.509 v3 certificates are used, provided a secure connection is to be set up. In the context of MQTT, the certificates used here are called application certificates.

You can maintain security settings, if you have defined a prefix for a secure connection (wss or mqtts) in the Server URI field on the Client tab.

• mqtts://

  For the secure Transport Layer Security (TLS) connection (mqtts), you can select an application certificate. PCo can use this certificate to identify itself to the MQTT server. Whether or not you have to specify a certificate depends on the MQTT server.

  You also define the settings for the certificate folders and the validation options. (See also: Certificate Folders and Certificate Validation Options.)

• wss ://

  For the secure WebSocket connection, you can choose from three authentication methods. (See: Authentication Method (wss).)

  If you have set authentication using a certificate, you must also make the settings for the certificate folders and the validation options. (See also: Certificate Folders and Certificate Validation Options.)