Using a Simple Firewall in CentOS 6

The firewall has changed in CentOS 6 but it still provides a simple way of setting up a firewall. The first thing to do is install the tui.  

yum install -y system-config-firewall-tui

Once it is installed then you can call the firewall with this command:  

system-config-firewall-tui  

The firewall configuration no longer has the SELinux settings and it will take you through a number of steps to set up the firewall. Of course you will want to enable the firewall and then select “Customize” with the tab.