If you have an existing web server (for example, Apache or IIS) or other application that is already using port 80 on the Cluster Manager host, you have the following options:
Uninstall the web server.
Disable the web server.
Reconfigure the web server to use another port.
Choose a non-default port (not 80) for Apache during Cluster Manager installation. The default Apache SSL port is 443.
By default, the Cluster Manager server uses port 8030 and secure port 8031.