Search Mailing List Archives

Limit search to: Subject & Body Subject Author
Sort by: Reverse Sort
Limit to: All This Week Last Week This Month Last Month
Select Date Range     through    

[liberationtech] popular circumvention tools have been blocked in Iran

Joseph Lorenzo Hall joe at
Wed Feb 10 15:00:06 PST 2016

So so so helpful, Collin!

On Wed, Feb 10, 2016 at 1:58 PM, Collin Anderson
<collin at> wrote:
> On Wed, Feb 10, 2016 at 11:09 AM, Joseph Lorenzo Hall <joe at> wrote:
>> Do we have any indication as to how they are blocking (e.g., given Iran's
>> past history, I'd tend to think it involves fingerprinting circumvention
>> tech protocols). best, Joe
> I don't believe its traffic classification on circumvention tools; the
> proliferation of obfsproxy-style and meek transports beyond Tor seems to
> made this more difficult. For the particular tools that I have checked, it
> appeared to be enumeration of network entry points through the censors
> running the tool or collecting aggregated network statistics from users, and
> then blocking found addresses. In certain cases, this layer three blocking
> and in others through in-line blocking on the application layer. In the
> latter scenario, the intention seems though to simply block SSL connection
> for addresses, and nothing more fine grain, e.g. whitelisting/blacklisting.
> Would be happy to test any tools, maybe FreeGate is next.
> --
> Collin David Anderson
> | @cda | Washington, D.C.
> --
> Liberationtech is public & archives are searchable on Google. Violations of
> list guidelines will get you moderated:
> Unsubscribe,
> change to digest, or change password by emailing moderator at
> companys at

Joseph Lorenzo Hall
Chief Technologist, Center for Democracy & Technology []
e: joe at, p: 202.407.8825, pgp:
Fingerprint: 3CA2 8D7B 9F6D DBD3 4B10  1607 5F86 6987 40A9 A871

CDT's annual dinner, Tech Prom, is April 6, 2016!

More information about the liberationtech mailing list