redhat open port

Q. I’ve Redhat Enterprise Linux 5 server with Iptabeles firewall enabled. By default it is only allowing port 22. How do I open port 80 / 143 / 110 on Linux? I’ve started all services but don’t know how to open port using iptables. A. By default iptables firewall stores its configuration at /etc/sysconfig/iptables file. […]