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[liberationtech] Verification of censorship resistance

Nick Skelsey nskelsey at
Fri Nov 18 09:06:42 PST 2016

Hi Richard,

The OONI project [1] (Open Observatory of Network Interference)
produces country by country breakdowns of the types of censorship
techniques occurring.


The project has a set of tests which attempt to determine exactly how
content is getting blocked and how connections are dropped. This is
probably your best bet at finding up to date filtering from empirical

There are other resources out there. If you find some good ones, please share.

Good Luck!
- NS

On Fri, Nov 18, 2016 at 5:04 PM, Richard Brooks <rrb at> wrote:
> Am doing a prototype tool for avoiding network traffic
> analysis. Does anyone have write ups on what national
> firewalls are using to filter traffic?
> There are the obvious DNS names, IP addresses, port numbers
> and keywords in the traffic content.
> What other header fields may be inspected?
> If anyone had tech reports they could point me to, it
> would be useful.
> I want to subject our prototype to as thorough an analysis
> as possible.
> Thanks,
> -Richard
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