Avoiding Internet Usage for COPY and UNLOAD Traffic in Amazon Redshift
Question
You've just set up an Amazon Redshift cluster, and you want all COPY and UNLOAD traffic between your cluster and your data repositories to go through your Amazon VPC.
You've noticed that the Internet is being utilized for the data being copied.
You want to ensure that the internet is not used during the copy operation.
How can you achieve this?
Answers
Explanations
Click on the arrows to vote for the correct answer
A. B. C. D.Answer - B.
The AWS Documentation mentions the following.
When you use Amazon Redshift Enhanced VPC Routing, Amazon Redshift forces all COPY and UNLOAD traffic between your cluster and your data repositories through your Amazon VPC.
You can now use standard VPC features, such as VPC security groups, network access control lists (ACLs), VPC endpoints, VPC endpoint policies, Internet gateways, and Domain Name System (DNS) servers, to tightly manage the flow of data between your Amazon Redshift cluster and other resources.
When you use Enhanced VPC Routing to route traffic through your VPC, you can also use VPC flow logs to monitor COPY and UNLOAD traffic.
If Enhanced VPC Routing is not enabled, Amazon Redshift routes traffic through the Internet, including traffic to other services within the AWS network.
Options A and C are invalid because this has more to do with the Security aspect.
Option D would be the same solution and not avoid traffic flowing via the Internet.
For more information on Enhanced VPC Routing, just browse to the below URL:
https://docs.aws.amazon.com/redshift/latest/mgmt/enhanced-vpc-routing.htmlTo ensure that all COPY and UNLOAD traffic between your Amazon Redshift cluster and data repositories goes through your Amazon VPC and the internet is not used during the copy operation, you can use the following steps:
Ensure that the Redshift cluster is located in a private subnet within your VPC. This ensures that the cluster is not accessible directly from the internet.
Ensure that your VPC has the correct route tables set up to direct traffic between your Redshift cluster and your data repositories. The route tables should have entries for both the Redshift cluster and the data repositories.
Ensure that the network access control lists (NACLs) are set up correctly for the subnets hosting the Redshift cluster. The NACLs should allow traffic between the Redshift cluster and the data repositories and block any unwanted traffic from the internet.
Ensure that enhanced VPC routing is enabled for the Redshift cluster. Enhanced VPC routing enables the cluster to use private IP addresses to communicate with other resources within your VPC, including your data repositories.
Ensure that the security groups are set up correctly for the EC2 instances hosting the Redshift cluster. The security groups should allow traffic between the Redshift cluster and the data repositories and block any unwanted traffic from the internet.
Ensure that the routing table points to a virtual private network ( VPN) instead of the internet gateway. This ensures that all traffic between the Redshift cluster and the data repositories goes through the VPN and is not routed through the internet.
Overall, to ensure that the internet is not used during the COPY and UNLOAD operation between the Redshift cluster and data repositories, you need to ensure that the Redshift cluster is located in a private subnet, the correct route tables are set up, the NACLs and security groups are set up correctly, and the routing table points to a VPN.
