[tor-dev] Information on Pluggable Transports

Dr. Brandon Wiley brandon at blanu.net
Mon Oct 15 22:33:20 UTC 2018

Yes, there are implementations of PT 2.0 and 2.1 specifications. One of the
criteria that we have adopted in the 2.1 specification process is that
proposals need to have an implementation available before they can be
considered for inclusion in a release of the specification.

Tor uses the part of the specification known as the Dispatcher IPC
Interface to control a Pluggable Transport provider (known as a dispatcher)
running in a separate process. The 2.0 and 2.1 versions of this protocol
are compatible.

You can find a dispatcher implementation which conforms to the 2.1
specification and is backwards-compatible with the 2.0 Dispatcher IPC
Interface specification here:
This dispatcher implementation currently provides the obfs2, obfs4, and
Shadowsocks transports.

At one point, we (Operator Foundation) provided a patch to Tor implementing
the 2.0 Dispatcher IPC Interface. You can find the fork here:
You can find the associated Trac ticket here:

Operator Foundation does not currently have any plans to commit additional
resources to the Tor patch, but it is there as a starting point if anyone
is interested in pursuing the project of updating Tor to conform to the PT
2.0 (and 2.1) protocol. We will be continuing to update the dispatcher
implementation to match the specification as it evolves, as well as adding
new transports as they are developed.

On Mon, Oct 15, 2018 at 4:52 PM teor <teor at riseup.net> wrote:

> Hi Brandon,
> On 16 Oct 2018, at 02:59, Dr. Brandon Wiley <brandon at blanu.net> wrote:
> If you are looking for information about Pluggable Transports, the
> Pluggable Transports website has up-to-date information:
> https://www.pluggabletransports.info/
> If you want to follow the specification process, drafts and proposal are
> available here:
> https://github.com/Pluggable-Transports/Pluggable-Transports-spec
> The current stable version of the specification is PT 2.0:
> https://github.com/Pluggable-Transports/Pluggable-Transports-spec/blob/master/releases/pt-2_0.pdf
> The current draft of the next version being working on is PT 2.1 draft 1:
> https://github.com/Pluggable-Transports/Pluggable-Transports-spec/tree/master/releases/PTSpecV2.1Draft1
> Is there any code that implements version 2.0 or 2.1 of these specs?
> Tor currently implements the PT 1.0 specification:
> https://github.com/Pluggable-Transports/Pluggable-Transports-spec/blob/master/releases/pt-1_0.txt
> T
> _______________________________________________
> tor-dev mailing list
> tor-dev at lists.torproject.org
> https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-dev
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.torproject.org/pipermail/tor-dev/attachments/20181015/79b19c52/attachment.html>

More information about the tor-dev mailing list