obfsproxy

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. client torrc

obfsproxy supports multiple protocols, called pluggable transports, 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.

Even though obfsproxy is a separate application, completely independent from tor, it speaks to tor using an internal protocol to minimize necessary end-user configuration.

Please open a ticket on our bug tracker for any bugs you find or features you would like to see added in future releases.

Download Obfsproxy Tor Browser Bundle

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

Windows Obfsproxy Tor Browser Bundle (signature).

OSX (10.6 & 10.7) Obfsproxy Tor Browser Bundle (signature).

Linux 32-bit Obfsproxy Tor Browser Bundle (signature).

Linux 64-bit Obfsproxy Tor Browser Bundle (signature).

Installation Instructions

To set up an obfsproxy bridge, or to build it from source, see the separate Obfsproxy Installation Instructions page.