About This Architecture

AWS Transfer Family SFTP architecture with dual-AZ endpoints for inbound SSH key authentication and outbound username/password delivery across public and private subnets. Inbound clients upload documents to S3 via SFTP endpoints, triggering Lambda document processors and EventBridge rules for automated workflows. Outbound tasks in ECS and Lambda retrieve processed files from S3, authenticate via Secrets Manager, and deliver to external clients while CloudWatch monitors all operations. This multi-layer design demonstrates high availability, least-privilege IAM access, and event-driven processing for secure B2B file exchange. Fork and customize this diagram on Diagrams.so to match your VPC topology, authentication methods, or processing logic.

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How do I design a secure, highly available SFTP inbound and outbound file transfer system on AWS with automated document processing?

This diagram shows a dual-AZ AWS Transfer Family SFTP architecture where inbound clients authenticate via SSH keys to upload documents to S3, triggering Lambda processors and EventBridge rules for automated workflows. Outbound ECS and Lambda tasks retrieve processed files, authenticate via Secrets Manager, and deliver to external clients, with CloudWatch monitoring and IAM roles enforcing least-pr