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    <h2>obfsproxy</h2>
    <div class="underline"></div>

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    <p>
    obfsproxy is a tool that attempts to circumvent censorship, by
    transforming the Tor traffic between the client and the
    bridge. This way, censors, who usually monitor traffic between the
    client and the bridge, will see innocent-looking transformed
    traffic instead of the actual Tor traffic.

    <img src="$(IMGROOT)/obfsproxy_diagram.png" alt="obfsproxy diagram"></a>
    </p>

    <p>
    obfsproxy supports multiple protocols, called <a href="<page docs/pluggable-transports>">pluggable
    transports</a>, which specify how the traffic is transformed. For
    example, there might be a HTTP transport which transforms Tor
    traffic to look like regular HTTP traffic.
    </p>

    <p>
    Even though obfsproxy is a separate application, completely
    independent from tor, it speaks to tor using an <a
    href="https://gitweb.torproject.org/torspec.git/blob/HEAD:/proposals/180-pluggable-transport.txt">internal
    protocol</a> to minimize necessary end-user configuration.
    </p>

    <p>
    Please open a <a
    href="https://trac.torproject.org/projects/tor/query?status=accepted&status=assigned&status=needs_information&status=needs_review&status=needs_revision&status=new&status=reopened&component=Obfsproxy&order=priority&col=id&col=summary&col=status&col=type&col=priority&col=milestone&col=component">ticket</a>
    on our bug tracker for any bugs you find or features you would
    like to see added in future releases.
    </p>

    <a id="moarbridges"></a>
    <h2><a class="anchor" href="#moarbridges">Looking for obfsproxy bridges?</a></h2>
    <p>
    <a href="https://bridges.torproject.org/?transport=obfs2">You can use BridgeDB to get obfsproxy bridges.</a>
    </p>


    <a id="download"></a>
    <h2><a class="anchor" href="#download">Download Obfsproxy Tor Browser Bundle</a></h2>

    <p>
    We've made an experimental package that currently works in all censored
    countries with no config changes.
    </p>

    <p>
    <a
    href="https://www.torproject.org/dist/torbrowser/tor-obfsproxy-browser-<version-torobfsbundlealpha>_en-US.exe">Windows Obfsproxy Tor Browser Bundle</a> (<a
    href="https://www.torproject.org/dist/torbrowser/tor-obfsproxy-browser-<version-torobfsbundlealpha>_en-US.exe.asc">signature</a>).
    </p>

    <p>
    <a href="https://www.torproject.org/dist/torbrowser/osx/TorBrowser-Obfsproxy-<version-torobfsbundleosx32alpha>-osx-i386-en-US.zip">OSX (10.6 & 10.7) 32-bit Obfsproxy Tor Browser Bundle</a>
    (<a href="https://www.torproject.org/dist/torbrowser/osx/TorBrowser-Obfsproxy-<version-torobfsbundleosx32alpha>-osx-i386-en-US.zip.asc">signature</a>).
    </p>

    <p>
    <a href="https://www.torproject.org/dist/torbrowser/osx/TorBrowser-Obfsproxy-<version-torobfsbundleosx64alpha>-osx-x86_64-en-US.zip">OSX (10.6 & 10.7) 64-bit Obfsproxy Tor Browser Bundle</a>
    (<a href="https://www.torproject.org/dist/torbrowser/osx/TorBrowser-Obfsproxy-<version-torobfsbundleosx64alpha>-osx-x86_64-en-US.zip.asc">signature</a>).
    </p>

    <p>
    <a href="https://www.torproject.org/dist/torbrowser/linux/tor-obfsproxy-browser-gnu-linux-i686-<version-torobfsbundlelinux32alpha>-dev-en-US.tar.gz">Linux 32-bit Obfsproxy Tor Browser Bundle</a>
    (<a href="https://www.torproject.org/dist/torbrowser/linux/tor-obfsproxy-browser-gnu-linux-i686-<version-torobfsbundlelinux32alpha>-dev-en-US.tar.gz.asc">signature</a>).
    </p>

    <p>
    <a href="https://www.torproject.org/dist/torbrowser/linux/tor-obfsproxy-browser-gnu-linux-x86_64-<version-torobfsbundlelinux64alpha>-dev-en-US.tar.gz">Linux 64-bit Obfsproxy Tor Browser Bundle</a>
    (<a href="https://www.torproject.org/dist/torbrowser/linux/tor-obfsproxy-browser-gnu-linux-x86_64-<version-torobfsbundlelinux64alpha>-dev-en-US.tar.gz.asc">signature</a>).
    </p>

    <h2><a class="anchor" href="#instructions">Installation Instructions</a></h2>

   <p>To set up an obfsproxy bridge, or to build
   it from source, see the separate <a href="<page
   projects/obfsproxy-instructions>#instructions">Obfsproxy Installation
   Instructions</a> page.
   </p>

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