I'm working with a third party webservice who requires that all calls to their service are made from whitelisted IP addresses. That is, I must give them IP addresses from which I will be making calls to their service.
Problem is I'm using Google Appengine. Is there any way to get a static IP address when making outgoing http requests from Appengine? Failing that - is there a block of IP addresses that all requests will come from? I could get the entire bloc whitelisted. If this exists, how likely is it to change?
I know I could setup a simple Amazon EC2 instance to use as a proxy (will ask another question for how to do this specifically) but just wanted to make sure there was no other way.
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