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{{Admon/caution|THIS IS AN OLD VERSION OF THE LAB|'''This is an archived version. Do not use this in your OPS235 course.'''}}
= LAB PREPARATION =
# On your '''centos1''' VM (i.e. the http server), confirm everything is working locally by using a browser to connect to '''http://localhost'''
# Set the default firewall configuration on centos1 to '''REJECT''' incoming requests to http (TCP/80)
# NOTE: '''centos1''': 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> # Confirm that you can't connect by using firefox on centos to connect to centos1 '''http://centos1/'''
# On '''centos2''' confirm that the httpd service is stopped so it cannot interfere with your observations.
# On '''centos2''' confirm that you can't connect by using firefox to centos1 '''http://centos1/'''
# The next step is to establish a <u>tunnel</u>. When you establish a tunnel you make an ssh connection to a remote host and open a new port on the local host. That local host port is then connected to a port on the remote host through the established tunnel. When you send requests to the local port it is forwarded through the tunnel to the remote port.
# In a terminal in your '''centos2''' VM, '''make certain you are NOT logged in as root!'''
