6to4 status (again)

[David Magda]

On Mon, February 25, 2013 23:53, Doug Barton wrote:
> NAT, no. There are not any even reasonably popular clients that don't
> work with UPNP/PMP.
>
> DPI is a candidate, but if you care about that you can force your client
> to be require encryption.

According to Hjelmvik and John, traffic analysis can determine encrypted
BitTorrent application type with an accuracy of over 96%:

http://www.iis.se/docs/hjelmvik_breaking.pdf

You may not be able to know what data the client is sending, but it can
figure out that it's BT.