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    <p>Unfortunately JMX tries to open ports other than the one you configure. Just yesterday I succeeded connecting to tomcat behind firewall via JMX. The two tricky parts are:</p> <ul> <li><p>put a file called <code>jmxremote.access</code> in <code>CATALINA_HOME/conf</code>, which contains the following lines:</p> <pre><code>monitorRole readonly controlRole readwrite </code></pre></li> <li><p>in <code>server.xml</code> set the ports that will be used by jmx, via a special tomcat listener (catalina-jmx-remote.jar required in /lib):</p> <pre><code>&lt;Listener className="org.apache.catalina.mbeans.JmxRemoteLifecycleListener" rmiRegistryPortPlatform="9009" rmiServerPortPlatform="9010" /&gt; </code></pre></li> </ul> <p>Then open these two ports on the firewall. It works. But that's just for tomcat.</p> <p>Another option is to use <a href="http://www.google.com/search?hl=&amp;q=ssh+tunneling&amp;sourceid=navclient-ff&amp;rlz=1B3GGGL_en___BG265&amp;ie=UTF-8" rel="nofollow">ssh tunnelling</a>. In short - you connect via SSH and configure it to forward some local port (where the jmx client is running) to some ports on the other side of the tunnel.</p> <p>References:</p> <ul> <li><a href="http://gabenell.blogspot.com/2010/04/connecting-to-jmx-on-tomcat-6-through.html" rel="nofollow">Connecting to JMX on Tomcat 6 through a firewall</a> </li> <li><a href="http://blogs.oracle.com/divyen/entry/connecting_mysql_server_on_amazon" rel="nofollow">Connecting MySQL server on Amazon EC2 instance using ssh tunnel</a></li> </ul>
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    1. COYou should add, that one also has to copy the `catalina-jmx-remote.jar` into `CATALINA_HOME/libs` otherwise a `ClassNotFoundException` is thrown. For further reading on this topic see http://tomcat.apache.org/tomcat-6.0-doc/config/listeners.html#JMX_Remote_Lifecycle_Listener_-_org.apache.catalina.mbeans.JmxRemoteLifecycleListener
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