[tor-dev] Tor proposals implemented in Tor 0.2.3.x

Fabian Keil freebsd-listen at fabiankeil.de
Sun Jul 1 17:06:29 UTC 2012

Ian Goldberg <iang at cs.uwaterloo.ca> wrote:

> On Sun, Jul 01, 2012 at 05:29:04PM +0200, Fabian Keil wrote:
> > >                                       So if only a handful of clients
> > > have upgraded to a TBB that supports it (none does at this time),
> > > they'll stand out.  That's why the default is "use the consensus value",
> > > which is currently off.  The consensus value can be turned on later,
> > > when "enough" people can support it.
> > 
> > The default can be changed, though, and while the man page
> > contains recommendations and even strong recommendation for
> > other parameter values, there's no recommendation for or against
> > changing the OptimisticData settings and the risks aren't
> > mentioned either.
> > 
> > The TorBrowser isn't the only client that could optimistically send
> > data and other clients (like Privoxy) will need an option for this,
> > that the user has to explicitly enable.
> > 
> > It's inappropriate for Privoxy's documentation to make recommendations
> > for or against modifications of Tor's OptimisticData option, therefore
> > it would be great if the Tor man page contained such a recommendation
> > so the Privoxy documentation can link to it without putting the user
> > at risk of changing the option after reading Tor's man page without
> > understanding the consequences.
> Does Privoxy support optimistic data?  SOCKS clients (TBB, Privoxy, IM
> clients, etc.) need to be modified in order to use this feature of Tor,
> as it entails the client sending the data to the SOCKS proxy (the Tor
> OP) *before* receiving the SOCKS connection response from it.

I implemented (partial) optimistic data support for Privoxy about a year
ago. The code hasn't been committed to the official repository due to the
documentation challenge outlined above.

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