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In order to use TLS/SSL for connecting clients (subscribers and publishers) to the broker, the one should check
Use TLS/SSL. After that, additional settings will be displayed to the user as shown below. Here the user can upload
certificates, key files and choose TLS version, which will be used for data encryption between broker and clients
(subscribers and publishers)
The MQTT broker also supports option called Bridge. It means, that two brokers can be connected to each other
and share messages. The window of bridge parameters are presented below. There are some mandatory parameters,
like Connection Name, Remote Address and Remote Port. Although connection name is mandatory, it should be set to
value what you like and according to mosquitto’s user manual this option denotes the client ID which will be used when
connecting to remote broker. There are some other parameters. If you would like to known that they mean and how to
use them you should check for mosquito.conf manual page.