Hi everyone, Here's a summary of the anti-censorship team's progress in June: BridgeDB ======== * Blacklisted 53 bridges whose obfs4 port was unreachable. Most of these bridges had no contact info. Some did, but the operators did not respond to our emails. * Tried to understand why BridgeDB responded to many requests with no bridges: <https://bugs.torproject.org/30441> - Eventually, the problem seems to have fixed itself. - We'll keep a close eye on the logs. * After hearing back from Tor's research safety board, we implemented a new feature that lets BridgeDB export statistics: <https://bugs.torproject.org/9316> The feature is currently under review. * Removed support for Yahoo email accounts: <https://bugs.torproject.org/28496> * Published a blog post about BridgeDB's new 0.7.1 release: <https://blog.torproject.org/new-release-bridgedb-071> Snowflake ========= * We released a prototype for snowflake's webextension! For Firefox, you can get it here: <https://addons.mozilla.org/en-US/firefox/addon/torproject-snowflake/> We're still working on getting it published in Chrome's web store. By installing the addon, you turn your browser into a circumvention proxy for censored users. * Working on integrating pion/webrtc to ease builds and reduce dependencies: <https://bugs.torproject.org/28942> * We wrapped up a ticket to collect statistics on snowflake's broker: <https://bugs.torproject.org/21315> * Brainstormed mechanism for snowflake update versioning: <https://bugs.torproject.org/30704> Pluggable transports ==================== * Implemented a patch to reorder PT/proxy phases: <https://bugs.torproject.org/28930> The patch is currently under review. * Brainstormed ideas for obfs4's successor: <https://bugs.torproject.org/30716> - We decided to first study the "long tail" of network traffic because it will allow us to make better design decisions: <https://bugs.torproject.org/30986> * We made some progress on improving our PT spec: <https://bugs.torproject.org/29285> - For now, we have been collecting a list of issues with the v1 spec. * We made some progress with loading shared libraries for PTs into the Tor executable (on Linux for now). Miscellaneous ============= * Deployed <https://bridges.torproject.org/scan/>. The service allows obfs4 operators to test the reachability of their obfs4 port -- at least until we are done with the following ticket: <https://bugs.torproject.org/30477> * We wrapped up our "does the GFW block obfs4?" ticket: <https://bugs.torproject.org/29279> The answer is: no. * Published a blog post that introduces our anti-censorship team and our Sponsor 19 report: <https://blog.torproject.org/tors-new-anti-censorship-team-defending-open-internet> * Asked tor-relays@ to set up more obfs4 bridges: <https://lists.torproject.org/pipermail/tor-relays/2019-June/017419.html> * Worked with a handful operators whose obfs4 bridges were broken. Several operators believed that only a bridge's OR port must be externally reachable. Others forgot to configure port forwarding for their obfs4 port.