The port on which CM Server listens for HTTP requests is defined by the Listen parameter in httpd.conf. For example, Listen 80 tells CM Server to listen on port 80 (the default for HTTP). You can change this to specify any available port number. For example, Listen 8000 tells CM Server to listen on port 8000.
If you want to change the default CM Server port or add ports, you must modify the files httpd.conf, plugin_cfg.xml, and virutalhosts.xml. If you are using more than one profile, you must modify all of these files for every profile you use. For file locations, see Changing the default CM Server ports. You do not need to modify the serverindex.xml file, which defines the of WebSphere® Application Server ports, unless you have another instance of WebSphere Application Server installed that is using the same ports.