Right now I'm working with Cloudfront as front-facing for the Application Load Balancer in AWS.
I attached my default Security Group (one) which has inbound rule both for HTTP and HTTPS for source 0.0.0.0/0, it works fine, and I can access my application.
But when I attached Security Groups (five) of it into the ALB which the inbound rule for HTTP and HTTPS are from the IP ranges of CDN I get 503/504.
I followed this blogspot in creating the SG using lambda function.
Any tip or idea how to resolve the issue? Thanks.
