Hello!
Fast trick to redirect ports when you are using an java application server.
Be careful because 80, 443, 8080 and 8181 ports will be open to Internet. If you want to close the 8080 and 8181 you will need an AJP proxy or to mark packets in the firewall. Read this link:
http://stackoverflow.com/questions/11065124/iptables-redirect-80-to-8080-but-block-public-8080-access
:)