In the article you mention not knowing the specific IPs appengine url-fetches come from, however a Google employee has said on this group you can get the IP ranges from
dig _netblocks.google.com TXT (they are announced for SPF purposes) The list is quite long and potentially changes so might not be suitable for adding to the remote APIs whitelist, but you could have a script on your proxy update its firewall with those. 2010/1/17 Attila-Mihaly Balazs <[email protected]>: > Hello everyone. > > I saw the question "what IPs do the urlfetch request come from" a > couple of times on the list (most recently I think it was in the > context of the delicio.us API which does whitelisting based on the > IP). I've done a small writeup about how my application (http:// > www.thetwitfeeder.com/) uses a VPS + a PHP script to ensure that > requests to the Twitter API come from a static IP: > http://blog.thetwitfeeder.com/2010/01/proxying-url-fetch-requests-from-google.html > > HTH > > PS. I'm considering launching a small commercial service around this > (ie. operating a "proxy" on one or more static IPs and selling > bandwidth). If somebody would be interested in such a service, I would > ask them to contact me in private. > > -- > You received this message because you are subscribed to the Google Groups > "Google App Engine" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/google-appengine?hl=en. > > > > -- Barry - www.nearby.org.uk - www.geograph.org.uk -
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