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# '''IMPORTANT:''' Before proceeding, '''flush the iptables rules''' for '''INPUT''', '''OUTPUT''', and '''FORWARD''' chains for both your '''c7host''' and '''centos1''' VMs.<br><br>
# Issue an iptables command to verify that both the the iptables rules have no rules for those chains for your '''c7host''' and '''centos1''' VM's
# On your '''c7host''' VM, add (append) an iptables rule to '''REJECT''' <u>incoming</u> requests to http ( via TCP, port:80) by issuing the command:<br><b><code><span style="color:#3366CC;font-size:1.2em;">iptables -A INPUT -p tcp --sport 80 REJECT</span></code></b>#
NOTE: '''c7host''': if '''http://localhost''' stops working locally, add the following iptables rule to centos1, as root <br /><b><code><span style="color:#3366CC;font-size:1.2em;">iptables - I INPUT -i lo -j ACCEPT</span></code></b>
# On '''centos1''' confirm that the httpd service is stopped so it cannot interfere with your observations.
# On '''centos1''' confirm that you can't connect by using firefox to centos1 '''http://centos1/'''