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{{Admon/caution|THIS IS AN OLD VERSION OF THE LAB|'''This is an archived version.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=
# Keep your '''centos1''' VM running (you will need it running later in this lab).
# Start the '''centos2''' VM and login
# Before we configure centos1 centos2 network configuration, we should create a timestamp file that can be used to see which files have changed as a result of using the GUI tool. Issue the following command:
#: <b><code><span style="color:#3366CC;font-size:1.2em;">date > /tmp/timestamp</span></code></b>
# Run the network configuration tool and enter the following static configuration in the same way that you configured '''centos1'''.
#: <b>nameserver 192.168.235.1</b>
# Save your editing session.
# Confirm your settings work by doing the following(you might need to do the steps '''3''' and '''4''' a few times before it works; keep checking with the commands below and wait a bit before each attempt):
#: <b><code><span style="color:#3366CC;font-size:1.2em;">ifconfig</span></code></b>
#:<b><code><span style="color:#3366CC;font-size:1.2em;">route -n</span></code></b>
#::NETMASK="255.255.255.0"
#::GATEWAY="192.168.235.1"
#::HWADDR="52:54:00:3f:5c:fa" <-- '''use the DO NOT COPY THIS VALUE! Use MAC address for YOUR interfaceusing:''' <code><span style="color:#3366CC;font-size:1.2em;">ifconfig eth0</span></code>
#::DNS1="192.168.235.1" '''
#::BOOTPROTO="static"
'''Answer Part 4 observations / questions in your lab log book.'''
=INVESTIGATION 2: VIRTUAL NETWORKING ENVIRONMENT TWEAKS AND OTHER USEFUL UTILITIES=
The final section below teaches you to make your iptables settings permanent.
# Make a backup of the file '''/etc/sysconfig/iptables'''# Examine the file to see how rules are added.# Issue by issuing the command: <br><b><code><span style="color:#3366CC;font-size:1.2em;">iptables-save > /etc/sysconfig/iptables-config.bk</span></code></b> to save the rules you added with the iptables command, above. #To make the iptables rules '''persistent''' (i.e. keeps rules when system restarts), you can issue the command: <br><b><code><span style="color:#3366CC;font-size:1.2em;">iptables-save > /etc/sysconfig/iptables</span></code></b>
# Verify that the file '''/etc/sysconfig/iptables''' exists.
# Restart your iptables service and test your configuration.
