Logicity itself doesn't use any ports for communication (that I know of), so what you are probably seeing is your database connection in between your Crystal Report and your database. For example, a Crystal Report using a SQL Server ODBC connection may connect to the database using port 1433 as specified in the ODBC control panel. If you want to make any changes to that, you change it in the ODBC control panel (and possibly on the server) and it uses the new port the next time the report is run without any changes to Logicity.
Hope this helps,
Adam