Changes

<li>The most recent variants of Centos and Fedora are using a service called '''firewalld''' that is intended to replace '''iptables''', however the ''iptables'' service is still in relatively common usage. In this course we will concentrate on ''iptables''.<olbr><libr>To Disable firewalldissue the following commands:<br><source langb><code><span style="bashcolor:#3366CC;font-size:1.2em;">systemctl disable firewalld</span></code></b><br><b><code><span style="color:#3366CC;font-size:1.2em;">systemctl stop firewalld</sourcespan></code></b><br></olbr><br><ol><li value="2">Install To install and enable the IPTables services, issue the following commands:<br><source langb><code><span style="bashcolor:#3366CC;font-size:1.2em;">yum install iptables-services</span></code></b><br><b><code><span style="color:#3366CC;font-size:1.2em;">systemctl enable iptables</span></code></b><br><b><code><span style="color:#3366CC;font-size:1.2em;">systemctl start iptables</sourcespan></code></olb><br></li>