WebSTAR FTP is written according to the FTP standards. It supports all common ports, all standard commands, and some optional commands.
The official FTP specification is at:
ftp://nic.merit.edu/documents/rfc/rfc0959.txt
FTP clients usually use two ports: port 20 for the Data Connection, and port 21 for the Control Connection. Browsers that act as FTP clients using the " PASV " command may use any port in the 9000 to 12000 range, and WebSTAR FTP will handle the requests properly.
See also: Firewalls and Server Ports .