Broker support should be installed on the machines that connect the controller to the target machine when the target machine is not directly accessible by the controller and the connection is made across the internet.
IBM® Endpoint Manager for Remote Control provides two ways to install the broker support. If you have access to the IBM Endpoint Manager console, use the deployment fixlets to deploy the broker support. For more details, see the IBM Endpoint Manager for Remote Control Console User's Guide. Alternatively use the IBM Endpoint Manager for Remote Control broker installation files.