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I plan on shipping small devices (like a MinnowBoard or CuBox) to some people. Is there some sort of software package that can "phone home" so that i have a way to administer it?

My current ideas are to use bash/netcat to provide a reverse shell, which will consistently try to connect to my server. But then I thought, what if more than one remote device tries to connect at the same time? Would it work correctly? Then ive been doing some research on AutoSSH.

Is there a relatively simple "NAT-proof" way to do this?

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ntop's n2n comes to mind but it's not reliable, unfortunately. – justbrowsing Aug 14 '13 at 23:01
    
n2n seems pretty cool! im gonna try it out... – Ace Aug 15 '13 at 18:11
    
i tried n2n and its pretty neat, ive done a little more research and i think im going to go with openvpn. – Ace Aug 22 '13 at 21:01
up vote 0 down vote accepted

Alright, I've tried n2n, openvpn, and tinc.

I feel that n2n definitely isn't as mature as the other two. Openvpns hub-and-spoke topology is not ideal.

My favorite option was tinc.

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