Google App Engine communicate with Compute Engine over internal network

Question

We\'re building an application in the google cloud. We\'re using App Engine as frontend and Compute Engine as backend. On these Compute Engine instances I\'m running a TCP s

Answer 1

There isn't currently a way to setup a private network between GCE and GAE. Limiting to google's IP range isn't secure since anyone on GAE or GCE could connect to your server. So I recommend that you authenticate incoming connections at your TCP server to verify the connection is coming from your GAE instances.