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In this investigation, we will use shell scripting to help automate our firewalls, and create our own customized chains for packet filtering.
===iptables Best Practices===
'''To Assist with iptables, try the following:'''
<ol><li value="2">Save your rule in a bash script (.sh file) so you don't lose it and can rerun it easily.<br><br></li><li>If you are disconnected from a VM: Some of the traffic between your host and VirtManager goes through IPtables.<br> When you mess with IPtables rules on the host - you may end up losing the console connection to the virtual machines. Don't worry, they're still running and you can still use them.</li></ol>