Howto set additional port in Tomcat:

in server.xml file:
(C:\Program Files\Apache Software Foundation\Tomcat 8.0\conf\ in windows )

Add the following section:
    <Connector port="8083" protocol="HTTP/1.1"
               connectionTimeout="20000"
               redirectPort="8443" />

Add this into the section called:
  <Service name="Catalina">

In this section, there will be a connector already defined for port "8080".
Copy the port "8083" section just below that one.