IPTABLES stores its configuration in the file : /etc/sysconfig/iptables. You can open a port number by editing this file but, you strictly need a root credentials to do this.
The steps are as follows:
1. Open the file /etc/sysconfig/iptables :
2. Append the following rule to it:
-A INPUT -m state state NEW -m tcp -p tcp dport [port_number] -j ACCEPT
Make sure that you change the [port_number] to the actual number (say 8088 or 8090).
3. Restart iptables:
4. Verify that the port is opened:
#netstat -tulpn | less