π When provisioning a new App Endpoint, make sure the Service is scaled to at least one container. Attempts to create an endpoint on a Service scaled to zero will fail.
βοΈ Do not use internal endpoints as an exclusive security measure. Always authenticate requests to Apps, even Apps that are only exposed over internal Endpoints.
π Review Using Nginx with Aptible Endpoints for details on using Nginx as a reverse proxy to route traffic to Internal Endpoints.
π§ Each Endpoint uses an AWS Elastic Load Balancer, which uses dynamic IP addresses to seamlessly scale based on request growth and provides seamless maintenance (of the ALB itself by AWS). As such, AWS may change the set of IP addresses at any time.