Port forwarding

IP tables port forwarding can be used to direct requests from one port to another. It is extremely helpful in situation where you need to run your application as non-root but still need to serve the app on port 80. This will also eliminate the need for root/sudo privileges.

iptables -t nat -A PREROUTING -i eth0 -p tcp --dport 80 -j REDIRECT --to-port 8000

To save the changes permanently, execute the save command.
service iptables save

To look at the saved configuration,
more /etc/sysconfig/iptables

You can also execute the stop and start conmands as required.
service iptables stop
service iptables start