If you've successfully installed Fusion Application Server and are experiencing slow responses accessing the JBoss console over IP on port 9990, then the following should help speed it up.
From your root directory, on the command line, open up the resolv.conf file (using VIM as follows):
$ vi /etc/resolv.conf
Delete the following three entries from this file;
(domain.com should be your own domain name)
Then save the file and exit VIM.
You'll now need to restart network services by running the following command from the command line:
$ service network restart
Hopefully navigating to JBoss should now be a lot snappier. e.g. https://<YOUR IP>:990