The port must be changed in Tomcat. Tomcat by default runs on port number 8080.
Find the file server.xml under TOMCAT_HOME/conf/ and edit it in ASCII mode. Modify the path according to your environment.
For example, in Windows, it will be in:
in USS it might be:
To actually change the port number, find the following string in the server.xml file and change the setting to the port you want to use.
NOTE: The string 8080 may be different if you specified another port during the installation.