What is AWS Gateway Endpoint

Think of this as adding a private route inside your VPC.

You don't create an elastic network interface (ENI). Instead, AWS adds a route to your route table that sends traffic destined for S3 or DynamoDB directly over the AWS network.

VPC

+------------------------------------+

 Lambda

    │

 Route Table

    │

Gateway Endpoint

    │

Amazon S3

There is no NAT Gateway, no Internet Gateway, and no ENI.

The route table simply knows that requests for S3 or DynamoDB should stay on the AWS backbone.

Characteristics

Free (no hourly endpoint charge)

Very high throughput

Simple routing

Only supports:

Amazon S3

Amazon DynamoDB