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Re: Tor and port 80



If you could determine the IP ranges used by the authorities, it would
be possible to reroute packets coming in on a particular port to a
HTTP server or a tor server depending on the originating IP. This is
assuming the authorities use a fixed set of IPs; though AFAIK IP
matching is used sucessfully on bittorrent clients like Azureus to
block RIAA/MPAA from connecting.

Again, if the "authorities" are smart then they could just change
their IP regularly.
-Patrick

On 27/09/05, Nick Mathewson <nickm@xxxxxxxxxxxxx> wrote:
> On Mon, Sep 26, 2005 at 01:12:12PM -0400, Marc Abel wrote:
> > Shame on me for not reading up on this prior to posting, but....
> >
> > Is there a hack for sharing port 80 between a Tor server AND a WWW
> > server on a single IP?
>
> For directory purposes, yes.  You need to make your web browser
> redirect all requests that start with /tor to the Tor server's
> directory port.
>
> For OR purposes, it's not likely to be easy.  You'd need to write a
> proxy that would check initial connections to see whether they look
> like SSL or HTTP, redirecting them to Tor in the first case and your
> browser in the second.
>
> >    What I'm thinking is, "looks like a website to
> > the authorities", and "looks like a Tor server to Chinese dissidents".
>
> The method you describe is unlikely to achieve this purpose, assuming
> that the "authorities" are smart.  If the server is a Tor server,
> you can find this out by trying to use Tor with it, and seeing whether
> it answers you.
>
> Later, Arrakis Tor <arrakistor@xxxxxxxxx> wrote:
> > Good question. I have no clue.
>
> Arrakis: when somebody sends a message to or-talk, hundreds of people
> receive it.  If every one of them who *didn't* know the answer said "I
> have no clue", it would be impossible to use the list.  I'm glad
> you want to help out, but please realize that it's not helpful to tell
> everybody when you don't know the answer to their question.
>
> yrs,
> --
> Nick Mathewson
>
>
>


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