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AWS Developer Associate

Amazon CloudFront


CloudFront - Origins

Restrict access to S3

CloudFront vs S3 Cross Region Replication

CloudFront S3 Cross Region Replication
Global Edge network Must be setup for each region you want replication to happen
Files are cached for a TTL (maybe a day) Files are updated in near real-time
Great for static content that must be available everywhere Read only, Great for dynamic content that needs to be available at low-latency in few regions

CloudFront Caching

What is CloudFront Cache Key?

CloudFront Policies - Cache Policy

CloudFront Caching - Cache Policy HTTP Headers

CloudFront Cache - Cache Policy Query Strings

CloudFront Policies - Origin Request Policy

Cache Policy vs. Origin Request Policy

Category Cache Policy Origin Request Policy
Purpose Controls how CloudFront caches and serves content Controls which requests CloudFront sends to the origin server
Configuration Can be created and configured at the distribution level Can be created and configured at the cache behavior level
Actions Determines whether to cache content, for how long, etc. Determines which requests should be forwarded to the origin
Caching flexibility Provides granular control over caching behavior Provides less granular control over caching behavior
Customization Can be customized based on HTTP headers, query strings, etc. Can be customized based on various conditions and criteria
Examples of actions Cache based on path pattern, query strings, headers, etc. Block requests based on IP address, user agent, or referrer

Overall, Cache Policy controls how content is cached and served by CloudFront, while Origin Request Policy controls which requests are forwarded to the origin server. Both policies can be customized and provide various levels of control over caching and request handling.

CloudFront - Cache Invalidations

Cache Invalidations

CloudFront - Cache Behaviors

CloudFront - Cache Behaviors - Sign In Page

Cache Behaviors

CloudFront Geo Restriction

CloudFront Signed URL / Signed Cookies

CloudFront Signed URL vs S3 Pre-Signed URL

CloudFront Signed URL S3 Pre-Signed URL
Allow access to a path, no matter the origin Issue a request as the person who pre-signed the URL
Account wide key-pair, only the root can manage it Uses the IAM key of the signing IAM principal
Can filter by IP, path, date, expiration Limited lifetime
Can leverage caching features  

CloudFront Signed URL Process

CloudFront - Pricing

CloudFront - Pricing


CloudFront – Price Classes

CloudFront – Price Classes


CloudFront - Multiple Origin

CloudFront - Origin Groups

CloudFront - Field Level Encryption

Field Level Encryption

CloudFront - Real Time Logs