SFTP Gateway is a secure, pre-configured SFTP server that saves uploaded files to an Amazon S3 bucket.

SFTP Gateway uses a different approach than other S3-based file system products that makes it more reliable for production systems. Rather than using a permanent mount or virtual file system, it monitors file descriptors as new files are written to SFTP directories. Once the file transfer is finished and the file descriptor is closed, it pushes the entire file to an S3 Bucket. MD5 Checksum validation is supported to ensure data integrity of uploaded files.

SFTP Gateway is not intended to be a mirror image of S3. However, it does support read-only download directories that are configurable on a per-user basis.

SFTP Gateway is simple, lightweight, and reliable. It is based on OpenSSH for secure file transfer, giving you the full support of the OpenSSH community for security updates and patches.

When coupled with S3 events and AWS Lambda, SFTP Gateway is the ideal entry point for automated integration between your AWS application and external or third-party systems. It also meets compliance regulations and corporate security policies that require key-based SFTP file transfers.

For High Availability, a web-based user interface, and programmable API, please refer to SFTP Gateway version 2.0 on the AWS Marketplace.