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A client has a Red Hat Linux-based firewall that is multihomed, and is connected to both the internal (eth0 192.168.0.1/24) and external (eth1 69.25.33.245/24) networks. They would like you to configure this firewall to act as the default Internet gateway. 1. What utilities would you use to accomplish this? Please list the commands and their parameters that you would execute. 2. What environment/kernel changes would be needed to make this work? What tools would you use to make the changes? What commands would you execute for the changes?  3. Once it’s working, how do you ensure that the configuration will persist a reboot? Please list the tools that you would use, commands that you would execute, or files that you would change, as applicable.
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Remote Linux Systems Administrator

Interviewed at Pythian

4.1★
Sep 16, 2015

A client has a Red Hat Linux-based firewall that is multihomed, and is connected to both the internal (eth0 192.168.0.1/24) and external (eth1 69.25.33.245/24) networks. They would like you to configure this firewall to act as the default Internet gateway. 1. What utilities would you use to accomplish this? Please list the commands and their parameters that you would execute. 2. What environment/kernel changes would be needed to make this work? What tools would you use to make the changes? What commands would you execute for the changes?  3. Once it’s working, how do you ensure that the configuration will persist a reboot? Please list the tools that you would use, commands that you would execute, or files that you would change, as applicable.

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