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[liberationtech] Cryptocat Censored in China

Ralph Holz holz at net.in.tum.de
Sat Dec 22 08:48:34 PST 2012


Hi Nadim,

I can confirm Philipp's report - everything looks fine from my vantage
point, too (Shanghai). The IP I see is 173.236.253.117, which is the
same as from Europe. https access is possible.

I wouldn't trust GreatFire.org's throttling metric - they had listed one
of my private sites as throttled once, too, and I really cannot imagine
why anyone should want to throttle that boring thing. ;)

Anyway, GreatFire is doing good stuff, but due to the nature of their
project, there is no way they can release exact information how they
measure, and thus for others to check.

Ralph

PS: While I was at it, I checked the current DNS rewriting for
twitter.com. It still points to a Korean IP.

On 12/22/2012 04:25 PM, Nadim Kobeissi wrote:
> Philipp,
> Where are you testing from? According to GreatFire.org, both websites
> are being blocked via throttling. The same site also reported that
> crypto.cat <http://crypto.cat> (the main server) was censored on
> September 6, although this was luckily circumvented when we switched to
> a new IP on September 27.
> 
> 
> NK
> 
> 
> On Sat, Dec 22, 2012 at 5:10 PM, Philipp Winter
> <identity.function at gmail.com <mailto:identity.function at gmail.com>> wrote:
> 
>     On Sat, Dec 22, 2012 at 09:50:18AM +0000, Joss Wright wrote:
>     > On Sat, Dec 22, 2012 at 09:58:50AM +0200, Nadim Kobeissi wrote:
>     > > I would like to report that Cryptocat is now being censored in
>     China. The
>     > > URLs being 100% blocked are:
>     > >
>     > > - Cryptocat Project Website: https://project.crypto.cat
>     > > - Cryptocat Development Blog: https://blog.crypto.cat
>     > >
>     > > We've tweeted an announcement and will probably follow with a
>     > > (non-China-accessible :/) blog post:
>     > > https://twitter.com/cryptocatapp/status/282393018693206016
>     >
>     > Any information on how the blocking is showing up? (DNS or IP
>     based, for
>     > example?)
> 
>     Everything looks fine for my Chinese vantage point. I get correct
>     DNS responses,
>     can reach the IP addresses and fetch the web sites over HTTP as well
>     as over
>     HTTPS.
> 
>     Cheers,
>     Philipp
>     --
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> 
> 
> 
> 
> --
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> 


-- 
Ralph Holz
Network Architectures and Services
Technische Universität München
Phone +49 89 28918043
http://www.net.in.tum.de/de/mitarbeiter/holz/
PGP: A805 D19C E23E 6BBB E0C4  86DC 520E 0C83 69B0 03EF



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