1)   VShell Server for UNIX 3.0 VShell SSH2 server is a secure alternative to Telnet and FTP on Windows and UNIX providing strong encryption, robust authentication and data integrity. Fine-tune your environment with precision control and a selection of authentication methods. 2)   VShell Server for Windows 3.0 VShell SSH2 server is a secure alternative to Telnet and FTP on Windows and UNIX providing strong encryption, robust authentication and data integrity. Fine-tune your environment with precision control and a selection of authentication methods.