This is an interesting question.  If I am not mistaken, the Great
Firewall is IP-based.  CloudFlare is a proxy.  If you are on public
(non-ssl) CF, you are using a shared IP and chances are you will have
erratic problems.  If you are using ssl, then you are still using a
shared IP, but only shared with ~20 other sites.  The chance that one
of those other sites will trigger a GFW ban is low... but not zero.

Depending on the consequences of China downtime for your app, it might
be a viable solution.  You can probably get CF to regenerate the
certificates and land you on a different IP if the old one ever gets
blocked.  Chances are it will never be an issue.

Of course, this requires making your app full-time SSL.  Which is not
a bad idea.

Jeff

On Tue, May 22, 2012 at 8:02 AM, Eric Ka Ka Ng <ngk...@gmail.com> wrote:
> before heard that there were access problem to GAE (ghs.google.com) from
> mainland china.
> would like to know latest status about this.
>
> now we hv domain mapped to GAE instance and seems some users from mainland
> china can access it without problems. but not sure if all users from
> different part of china can access, at anytime? also, any help if going
> through cloudfare?
>
> - eric
>
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