I notice a lot of google app websites are proxy servers, and what I
think people can do is basically submit a url with the proxy server in
front of it to google and google will index it but it will also allow
you take down a competitor's website with this method, perhaps this is
an issue that the google apps department might look into? because once
google indexes the website with the google app proxy server in front
of it, the website will not longer be accessible to the google
visitors because it will produce a 503 error.

On Apr 29, 10:41 am, Barry Hunter <barrybhun...@googlemail.com> wrote:
> If its your application its proxying, you could block it.
>
> Requests from AppEngine go via UrlFetch API, which adds a user-agent
> identifying the app in question.
>
> "AppEngine-Google; (+http://code.google.com/appengine;appid: xxxxx)"
>
> (alternatively if dont want to block it totally, add meta robots
> "nofollow,noindex" to pages you serve via the proxy)
>
> On 29 April 2010 18:36, Tony Jackson <upperh...@gmail.com> wrote:
>
> > I notice this url is appearing before a number of urls in google and
> > google is reading the website thru this proxy. Is there a way google
> > can recognize this proxy and not read urls directly from it because it
> > is also giving the error" This Google App Engine application is
> > temporarily over its serving quota"
>
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