Hi,
If you really like to know about port address for the http as well as you want to change it to your specific way, for the jboss 4.x
i will suggest you to go to the below location.
%JBOSS_HOME%\server\default\deploy\jboss-web.deployer and open
server.xml
else if you are using jboss 5.x you can go to the
%JBOSS_HOME%\server\default\deploy\jbossweb.sar and open
server.xml. And after opening the file
try to find out the similar code written in the code section.
port="8080" can be changed with the user defined number but make sure you are not trying to use some reserved port and the other default ports which are mentioned and already allocated for the diffrent applications.
I hope post of mine is what your are intended .
Thanks
Vikash