More information. I got it working using the following: server: Windows XP, JDK 1.5.0_16, JBossAS 4.2.3 jconsole: Fedora 8, JDK 1.6.0_10 I could not get it working the other way around. I know it is not a firewall issue because I changed the iptables and restarted the service, and after I did that I was able to connect from Windows to Linux, port 12345 using telnet, but attempting to connect using JConsole did not work. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4188611#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...