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# Restart the '''iptables''' service
# Re-issue '''iptables -L''' commands making certain to redirect output to a second file ('''after.txt'''). This should provide a listing of the new state of your firewall settings.
# You now should have two text files representing the <u>before</u> and <u>after</u> states of your firewall. Compare differences between these two files using the diff command (You should have used this tool in ULI101). The command-line tool '''diffULI101''' takes some time to get used to but you'll get used to it eventually, it's used a lot in the industry).
#Run '''diff -u before.txt after.txt''' and figure out how to read the output.<br><br>'''TIP:''' You can also install a graphical tool that makes it much easier to see differences: '''kompare before.txt after.txt'''<br><br>
# You can use these tools to compare any two text files, they often come in handy. For Note in your lab logbook the purpose of this lab notice that some iptables rules are that were added automatically by the '''libvirtd ''' service.
=== Simple Rule Changes ===