![]() The Proxy Subnet contains outbound proxies for filtering outbound traffic from private instances in AWS.The Public Subnet layer contains NAT gateways for routing traffic to an Internet Gateway.Working from the Internet Gateway inwards: The diagram below describes a network zone design for a VPC used for transferring data communicating with S3 VPC Endpoints. The solution enables access from corporate data centres to a set of approved S3 buckets, allowing teams to privately and securely upload data to S3. In this article, I will explore how these solutions can work together to enable private and secure data transfers from on-premises data centres to S3 over a DirectConnect link or a trusted VPN connection. There is also a well-defined pattern for private connectivity to S3 from corporate data centres and a blog post on how to add domain whitelisting for Internet-bound traffic from inside a VPC using Squid proxies. This introduces complexity and performance overheads for development teams looking to build applications in AWS that rely on S3 for storage.ĪWS has released a number of features to support private access to S3, including VPC Endpoints and a variety of directives and conditions for bucket policies. Heavily regulated enterprises involved with sensitive commercial and customer data often treat public cloud services as low-trust and enforce inspection, filtering and data loss prevention on data transfer to services such as S3. ![]()
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