You are also required to whitelist https://api.smartup.io which is our backend load balancer’s dns name.We use Amazon CloudFront as our CDN so kindly whitelist these specific domains:
Our Certification Authorities Root certificates can be found on the following link: https://www.amazontrust.com/repository/ .
Our service is HTTPS only (standard port 443), but opening port 80 might be necessary if you want your users to be redirected if they access our domain using explicit “http” URL schema. (Some browsers tend to do that).
On our API we serve information exclusively on HTTPS (443), establishing connection without encryption is not possible.