<li value="3">Start the virtualization service: <b><code><span style="pointer-events: none;cursor: default;color:#3366CC;">service libvirtd start</span></code></b></li> <li>The firewall configuration is altered by the addition of the virtualization software. Restart the firewall so that these changes become active: <b><code><span style="pointer-events: none;cursor: default;color:#3366CC;">service iptables restart</span></code></b></li>