On 07/05/2011 05:46 PM, Shane R. Spencer wrote:
> I'd be interested in knowing how they can detect rooted phones if the mobile network is
> simply an ethernet interface on the phone. Which it is. You can't even detect tethering
> at that point without scanning the traffic to find requests that are obviously not being
> delivered to a mobile web client - which is utterly inconclusive.
>
Shane, I know we talked about this. I can't necessarily tell regarding
rooting of the phone, but with the programming, there are several
configuration options in the phone itself that would assist identify
tethering, vs. nontethering. There is the PPP Username and Password,
the NAI, and the DUN NAI. Depending on the phone, how the carrier uses
the programming (and profiles), and possibly other things, you can
specify how each of those functions. So, if you hit the web, it uses
the NAI. If you tether using USB which may present an ethernet
interface to your laptop, it might use the DUN NAI. If the phone
presents a simple modem via the USB interface, it might use the PPP
Username and Password.
So, how the connection is presented to your laptop is determined
partially by the phone and what it is capable of, and partially by the
programming. Again, I can't speak for rooted phones. But I'd guess
that eventually you'd be found out - if the carrier has even a fairly
unsophisticated system. If the average smartphone uses 4GB a month, and
your phone magically uses 40GB, you'll show up on some list or another
and end up getting a letter, a phone call, or simply no dialtone one day.
Adam
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Received on Tue Jul 5 23:16:06 2011
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