So,I have a cloud account with Rackspace Cloud. I've set up a server with them. They gave me an IP and a password. I SSH'd to the machine, installed Mysql-server, Java and JBoss 5.0.1. I started JBoss on port 80 by modifying the server.xml in the JBOSS_HOME/server/default/deploy/jbossweb.sar/ directory. I start JBoss server with a EAR deployed, which deploys without errors. I've tested this EAR on my local instance of this same server. In fact, by "install" I meant "tarred up, scp'd and untarred on the cloud server."
After starting the server, with seemingly no problems, when I point to the IP in my browswer, I get an unable to connect error. I'm expecting JBoss's default management stuff to show up. I also tried several different pages in my deployed EAR and go the same thing.
I'm really, really new at this. What could I be doing wrong?
I found the problem on my own, fortunately. Checking the IP Tables on your fresh Rackspace Cloud server might solve your problems if you encounter something similar to the question asked.