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# Stop the '''libvirtd''' service
# 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. Use a different, but an appropriate file-name.
# 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 '''diff''' 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>