FTP over SSL

SFTP is only available to cpanel users and not to virtual ftp users for secure connection, but you can use FTP over SSL/TLS.

For this
1) Please enable TLS Encryption Support from WHM
Main >> FTP Server Configuration
TLS Encryption Support >> optional

2) On the FTP client use server type as
Host: domain or Ip
Port : 21
Server Type : FTPES -FTP over explicit TLS/SSL

3) For using particular ssl certificate in WHM
Main >> Manage Service SSL Certificates >> FTP section >> install new certificate