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'''Perform the Following Steps:'''
# Leave your VMs running for this section (which seems counter-intuitive).
# Stop the '''libvirtd''' service (refer to [http://zenit.senecac.on.ca/wiki/index.php/Init_vs_systemd#systemd_Command_Usage systemctl] command).
# Run '''iptables -L''' but redirect the output to a text file called '''before.txt''' (you will be using this file later).
#Run '''diff -u before.txt after.txt''' and figure out how to read the output.
{{Admon/tip|Graphically Compare File Differences|You can also install a graphical tool that makes it much easier to see differences: '''kompare before.txt after.txt}}
<ol><li value="78">You can use these tools to compare any two text files, they often come in handy. Note in your lab logbook the iptables rules that were added automatically by the '''libvirtd''' service.</li><li>Are there any differences between those 2 files? What does this mean if your VMs get disconnected in terms of the firewall rules?</li></ol>
=== Practice Setting Firewall Rules ===
