There are two primary components to WS_FTP Server.
Note: When WS_FTP Server is installed, three listeners are created by default: one listens on all available IP addresses on port 21 for FTP connections; one listens on port 990 for Implicit SSL connections; and one listens on all available IP addresses on port 22 for SSH connections.
For more information about listeners, see Setting Up Listeners. For more information about SSL, see Configuring SSL for a Host.