Linux IP Masquerade HOWTO
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# 2.4. Who Doesn't Need IP Masquerade?

- If your machine is a stand-alone Linux host connected to the Internet (setting up a firewall is a good idea though), or

- if you already have multiple assigned public addresses for your OTHER machines, and

- if you don't like the idea of a 'free ride' using Linux and feel more comfortable using expensive commercial tools to perform the exact same functionalities.

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Who Can Benefit From IP Masquerade? | Up | How does IP Masquerade Work?