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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.
769
For IPv4: 8.8.8.8 and/or 8.8.4.4 . For IPv6: 2001:4860:4860::8888 and/or 2001:4860:4860::8844 .
Any outbound connection from the applications, such as to a back-end database, uses one of the outbound public IP addresses as the origin IP address. The IP address is selected randomly at runtime, so your back-end service must open its firewall to all the outbound IP addresses.
The App Engine standard environment is based on container instances running on Google's infrastructure. Containers are preconfigured with one of several available runtimes. The standard environment makes it easy to build and deploy an application that runs reliably even under heavy load and with large amounts of data.
I had the same problem a couple of weeks ago connecting via Urlfetch from Google App Engine to the Stack Exchange API (The team has promptly fixed the problem whitelisting all the GAE IPs).
The range of IP addresses that urlfetch connections may come from, can be found by performing the following DNS lookup:
dig -t TXT _netblocks.google.com @ns1.google.com
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