Depending on the client's SSL configuration, clients connect to Broker Server through one of the three Broker Server ports available for client connections.

The base port of the Broker Server is used for non-SSL connections. The port that is numbered one less than the base port is used when the client is configured for one-way SSL authentication. The port numbered two less than the base port is used when the client is configured for two-way SSL authentication.

For example, if the default port 6849 is the base port of the Broker Server, port 6849 is used for non-SSL connections, port 6848 is used for one-way SSL connections, and the port 6847 is used for two-way SSL connections.