As we are running all our workload in Kubernetes at Halodoc, we will be adding the following changes in ingress ALB.We need to make the following changes in the Origins by adding the Origin Custom Headers in the CloudFront.Īfter making the change it will look like this:.This implementation includes the following important steps: Application Load Balancer (ALB)-Origin, will be having only HTTPS as a listener having a condition applied to allow the only request which comes on port 443 and with proper custom header attached with it otherwise it will block at ALB level and return a static response with status code 403.All these communications will happen via HTTPS protocol as we have restricted the Origin Protocol Policy, HTTPS only. If the content isn’t in the cache, CloudFront adds the custom header with the value of the header configured in the origin's config and forwards the request to the origin. If the content is in the cache, CloudFront returns it to the user. CloudFront checks its cache for the requested content.AWS WAF inspects the incoming request according to configured web ACL rules. Route53 routes the request to a CloudFront edge location that can best serve the request in terms of low latency by serving from the nearest location.A viewer requests for the content or file by calling the domain name.Here’s how it works, as shown in the above architecture: Let's have an architecture to understand more in detail. In this approach, we will be having the custom-header configured at the CloudFront level and adding the condition at ALB. And we will be enabling the origin access restriction by implementing the custom headers. In this case, we will be considering the ALB as a CloudFront origin resource. In this blog post, we’ll see how to use CloudFront custom headers to restrict viewer requests from accessing your CloudFront origin resources directly. When you deliver web content through a CloudFront, a best practice is to prevent viewer requests from bypassing the CDN(CloudFront) and accessing your origin content directly. CloudFront ensures that end-user requests are served by the nearest edge location which results in, viewer requests travel a short distance with the least latency, improves performance for the viewers. CloudFront is a web service that speeds up the distribution of your web content through edge locations. Every public endpoint which provides static or dynamic content is eligible to improve their performance, availability, and security by using Amazon CloudFront as your content delivery network (CDN) if applicable.
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