SilverSHielD

SilverSHielD is a free, feature-rich, award-winning SSH (SSH2) and SFTP server for Windows. Below you can read some of its features:

Authentication

Keyboard-interactive Password-based (also supports Windows/AD account authentication!) Public-Key (supports multiple keys per user!)

Additional security settings

Ability to set the maximum number of concurrent connections (Pro edition only) Ability to force a delay upon new connection, for anti-hammering Put the client IP in tarpit after a definable number of failed authentication attempts Limit access only to certain IP addresses or networks Per-folder permissions on virtual folders Virtual folders can be hidden (but still perfectly functional) Per-user IP security Auto-disable user account after a cetrain date/time SafeUp™ server-side file-transfer protection technology PCI-compliant

Functions and subsystems

Secure Shell/Command (SSH2) Forwarding SFTP (supports files larger than 4 GB!) Compression (Zlib) Powerful script-based event handling subsystem, with support for 4 major scripting languages (NEW!)

Administration

SilverSHielD runs as a system service and local/remote administration is performed though a modern Management Console, included in the download package, which establishes a secure channel with the SilverSHielD server and allows remote configuration of one or many servers Alternatively you can take advantage of the Command-Line Interface (CLI) to integrate SilverSHielD management into your workflow, even using 3rd party management tools (provided such tools can call a command line application)

Unlike many other competing products, SilverSHielD isn't loaded with tons of (often useless) features; instead it's focused on simplicity and ease of use, and of course on security and reliability.