Secure SFTP - FTP Server for Windows Server 2016 is the best solution to transfer files and data securely over encrypted network layers (using SSH2 protocol). SFTP is not just a simple "FTP over SSH" wrapper - it is a newer protocol, supported by all SSH2 servers.

With SSH protocol, the secure data transfer across the network is enabled in SFTP Server by default. Strong encryption for identities, passwords, and the data transmitted allows the user to transfer the files safely so that they cannot be attacked and stolen.

For secure transmission that protects the username and password, and encrypts the content, FTP is secured with SSL/TLS (FTPS) or replaced with SSH File Transfer Protocol (SFTP).

Features that provide unhackable encryption:

Supports SSH File Transfer Protocol (SFTP), FTP, FTP over SSL/TLS (FTPS)
Supports resume and transfer of large files
Per-user permissions on the underlying file system
Active Directory integration LDAP
GUI configuration tool
Restrict access to connect with IP address ACL
Logging
Create Virtual Directories
View / Disconnect active users
Limit max connections and set idle timeout
Ability to change ports
Set max transfer rate per user