[tor-qa] Experimental 3.5.2 bundles with tor-fw-helper (automatic port forwarding)

[Lunar]

Lunar:
> David Fifield:
> > Please test these experimental bundles that have tor-fw-helper included.
> > You may know that flash proxy requires people to set up port forwarding
> > (https://trac.torproject.org/projects/tor/wiki/FlashProxyHowto).
> > tor-fw-helper is a tool that uses UPnP or NAT-PMP to forward a port
> > automatically. I'm interested in finding out how likely it is to work.
> > 
> > https://people.torproject.org/~dcf/pt-bundle/3.5.2-fwhelper-1/
> > 
> > The bundles are configured to run flash proxy and tor-fw-helper. You
> > just have to click "Connect" and wait up to 60 seconds. You don't have
> > to do any special tests; just see whether it bootstraps or not.
> 
> I've tried on a Ubuntu 13.10 live system one one network. No luck. :(

We solved it with David. The problem was that the IPv6 address was
given to registrators. Adding `-4` to the flashproxy-client flags in
torrc made it work.

In the process, we discovered that NAT-PMP is having really weird
behaviour and should probably be discarded.

Two other problems I can think of:

 * tor-fw-helper currently registers the port redirection under the
   label “Tor relay”. That's OK if used by a relay operator on their own
   network, but not in the use case where Tor is banned and you want to
   conceal its usage.
 * There's no unregistration process when the browser is shut down, so
   the ports will stay open as until the router is rebooted (or at least
   that was my impression). Probably we would like to fix that as
   browsers can be restarted several times in course of a single day.

Otherwise, I think it's pretty awesome to be that straightforward to
use.

-- 
Lunar                                             <lunar at torproject.org>
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