Overview

SSH (Secure Shell) protocol, also known as SFTP (Secure File Transfer Protocol), can be used with FTP to provide improved security over standard FTP. This chapter describes how the SSH protocol is used within Progress WS_FTP Professional.

SSH is a security protocol that lets you make a secure connection to a server that has the SSH and SFTP (Secure File Transfer Protocol) protocols installed.

SSH encrypts all communications to and from the client and server. When an SSH connection is made, SFTP is the protocol that is used to perform all tasks on that single secure connection. For maximum security, Progress WS_FTP Professional uses SSH2 with the SFTP protocol to make SSH transfers.

Whereas FTP servers usually 'listen' on port 21 for connection, SSH servers use port 22.

Note: SSH can be used with a variety of authentication methods. However, WS_FTP only supports simple password authentication, public key authentication, and keyboard interactive authentication.
Note: WS_FTP Professional supports SFTP/SSH2 only.