* Use yum to uninstall firewalld and install iptables-services
* Use systemctl to start the iptables service and configure it to be started on boot.
IPtables is a complex system, and there's a lot of material this week to cover it. Keep in mind as you're going through the lab that you're trying to learn three things:
::# Since the '''RELATED,ESTABLISHED''' rule already exists, we are only concerned about <u>'''controlling'''</u> the '''incoming traffic on the server''', which in our example, the '''chain is: INPUT''', the '''protocol is: tcp''', and the '''destination is: port 80'''.
'Most other services work in a similar way as discussed above.