Amazon CloudFront Origins

• An origin is the origin of the files that CDN will distribute.

• Origins can be either an S3 bucket,an EC2 instance,an ELB,or Route 53 - can also be external.

• A custom origin server is a HTTP server which can be an EC2 instance or an on-premise/non AWS web servers.

• Amazon EC2 instances are considered custom origins.

• Static sites on Amazon S3 are also considered custom origins.