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I currently find myself in a situation where I need to find a NAT solution for a rooted Android 2.2 device other than IPTABLES, since I am stuck on using a particular ROM that doesn't support IPTABLES.

I need said Android device to act as a NAT gateway between an external host connected through its Ethernet port, and the Android device's internal WiFi connection (not its cellular connection).

I have tried searching for a simple NAT daemon available for any operating system, just for kicks. It turns out that such a solution is nothing more than a pipe dream, considering they would require unportable kernel modules.

I have noticed some Android software out there, such as EasyTether, that claim they support NAT. And, this is apparently even without requiring a rooted system. So, it must be possible to implement based off some solution.

I even recall one such software stating that it had used a Java NAT solution. I could not find anything like this made in Java. Running Java apps on Android IS a possibility.

So, does anyone have any input as to how a NAT solution might be implemented? TIA.

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closed as too localized by Izzy, ce4, Bryan Denny Jan 2 '13 at 15:55

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