GEEKS you must have learned about xinetd based services in your RHCE Training or RHCSS Training.

While configuring xinetd based services you can use some simple parameters to harden your services and control them in a much better way It will also prevent DOS attacks using those services.

Here I am using xinetd based parameters for better resource utilization.

Here is the screenshot from my RHEL 6 machine.

Securing Xinetd Services

Securing Xinetd Services