Configure Private Access for EC2 Instance to DynamoDB in Different Region

Answer - B.

For the private connections between regions, VPC peering should be used.

Then VPC endpoint allows users to access the DynamoDB service privately.

Option A is incorrect because you cannot configure an inter-region VPC endpoint directly.

Option B is CORRECT because the VPC endpoint should be created in consumer VPC which is in us-east-1

ENI will be created in us-east-1 which will access DynamoDB over VPC peering & AWS PrivateLink.

Option C is incorrect: This option does not mention the usage of the VPC endpoint.

Option D is incorrect: Because VPC peering supports the inter-region connections.

You can refer to the below URL for inter-region peering & endpoints.

https://d1.awsstatic.com/whitepapers/aws-privatelink.pdf https://docs.aws.amazon.com/vpc/latest/privatelink/endpoint-service-overview.html

To enable the EC2 instance in the us-east-1 region to access the DynamoDB table in the us-east-2 region privately without leaving the Amazon network, we need to establish a private network connection between the two regions.

There are two possible solutions for this scenario:

1. Configure an inter-region VPC endpoint for the DynamoDB service.
2. Create an inter-region VPC peering connection between us-east-1 and us-east-2.

Option A: Configure an inter-region VPC endpoint for the DynamoDB service.

A VPC endpoint enables private communication between instances in a VPC and AWS services. With VPC endpoints, you can access AWS services via private network connections instead of going through the internet. You can create a VPC endpoint for DynamoDB in the us-east-1 region and use it to access the DynamoDB table in the us-east-2 region.

Steps to configure an inter-region VPC endpoint for the DynamoDB service:

1. Create a VPC in the us-east-1 region and attach the EC2 instance to the VPC.
2. Create a VPC endpoint for DynamoDB in the us-east-1 region and attach it to the VPC.
3. In the VPC endpoint configuration, select the DynamoDB table in the us-east-2 region as the target.
4. Ensure that the security group rules on the EC2 instance allow traffic to the VPC endpoint.

Option B: Create an inter-region VPC peering connection between us-east-1 and us-east-2.

VPC peering enables private communication between VPCs in different regions using private IP addresses. You can create a VPC peering connection between the VPC in the us-east-1 region and the VPC in the us-east-2 region, and configure the route tables to allow traffic to flow between the two VPCs.

Steps to create an inter-region VPC peering connection between us-east-1 and us-east-2:

1. Create a VPC in the us-east-1 region and attach the EC2 instance to the VPC.
2. Create a VPC in the us-east-2 region and create a DynamoDB table in the VPC.
3. Create a VPC peering connection between the VPCs in the us-east-1 and us-east-2 regions.
4. Configure the route tables to allow traffic to flow between the VPCs.
5. Ensure that the security group rules on the EC2 instance allow traffic to the VPC.

Option C: Incorrect

Although inter-region VPC peering can be used, a VPC endpoint for DynamoDB is not required.

Option D: Incorrect

It is possible to set up private inter-region connections in AWS. Therefore, this option is incorrect.

In conclusion, the recommended solution to access a DynamoDB table from an EC2 instance in a different region while maintaining private communication is to use either an inter-region VPC endpoint for DynamoDB or an inter-region VPC peering connection.