Discover the precise steps to grant secure Amazon S3 access within corporate networks while reinforcing firewall rules. Learn the best approach using IP prefixes for enhanced security.
Table of Contents
Question
A company’s internal security team receives a request to allow Amazon S3 access from inside the corporate network. All external traffic must be explicitly allowed through the corporate firewalls.
How can the security team grant this access?
A. Schedule a script to perform a DNS lookup on Amazon S3 endpoints. Update the firewall rules accordingly.
B. Schedule a script to download and parse the Amazon S3 IP prefixes from the ip-ranges.json file.
Update the firewall rules accordingly.
C. Connect the data center to a VPC using AWS Direct Connect. Create routes that forward traffic from the data center to an Amazon S3 VPC endpoint.
D. Schedule a script to download the Amazon S3 IP prefixes from AWS developer forum announcements.
Update the firewall rules accordingly.
Answer
B. Schedule a script to download and parse the Amazon S3 IP prefixes from the ip-ranges.json file.
Explanation
The best approach for the security team to grant Amazon S3 access from within the corporate network while allowing external traffic only through the corporate firewalls is by utilizing option B. This involves scheduling a script to download and parse the Amazon S3 IP prefixes from the ip-ranges.json file and subsequently updating the firewall rules accordingly.
Option A, while involving DNS lookup, might not provide the comprehensive and up-to-date list of IP addresses needed for Amazon S3 access. Moreover, relying solely on DNS lookup might introduce potential risks due to its dynamic nature.
Option C suggests connecting the data center to a VPC using AWS Direct Connect and creating routes to forward traffic to an Amazon S3 VPC endpoint. While this can establish a secure connection, it might be more complex and not align directly with the requirement of allowing access from inside the corporate network while enforcing explicit external traffic through corporate firewalls.
Option D, similar to Option A, relies on downloading IP prefixes from potentially unofficial sources like developer forums, which might lack reliability and security updates.
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