Wing FTP Server can listen on multiple ports (or multiple IP addresses) for FTP/SFTP/HTTP protocols.
The supported transfer protocols: FTP, FTPS, HTTP, HTTPS and SFTP.
This domain listener address, default "*" means the listener port listens on all the available IPs.
If you change it into a single IP address, then the listener port will listen on that IP address only.
The available port is 1 - 65535.