title: How can I change the default port (8080) on Amazon EC to port 80
body: <p>I tried to change the default port on my Tomcat, with the <code>server.xml</code> file, changing <code>8080</code> to <code>80</code>. But when I try to visit my application, it is not available. What am I doing wrong? Are there some security issues with Amazon EC2?</p>