JMX enabled Java application appears to open a random high order port when JMX client connects

java random port jmx firewall
user221014 picture user221014 · Aug 23, 2011 · Viewed 9.4k times · Source

JMX enabled Java application appears to open a random high order port when JMX client connects

I have successfully configured a helloworld JMX enabled program, and I can connect to it using jconsole JMX client from a remote location.

When I attempt to turn on iptables I noticed that a random high order port is established when a client logs in. Eventually I would like to monitor Java applications in firewall segregated network segments. Can we control the range the random port opens in?

I'll move this question to serverfault.com if suggested.

Answer

hzpz picture hzpz · Aug 5, 2015

Since Java 7u25 the RMI port can be changed with a system property:

-Dcom.sun.management.jmxremote.rmi.port=1234

See this answer for details.

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