You first specify the host and port settings for the CAS Service as part of the installation wizard. That host runs the CAS Server, the Component Instance Manager, and all Record Store instances. The installation wizard then writes the host (com.endeca.itl.cas.server.host) and port (com.endeca.itl.cas.server.port) settings as properties in commandline.properties. All of the CAS command-line utilities use these settings as default values if you omit the -h and -p flags when executing any tasks.