Standard FTP Ports
Port 21 - Command port where clients connect and send instructions to the FTP server
Port 20 - Data port used to transfer files and directory listings (in active mode)
Secure FTP Ports
Port 990 - Used for FTPS (FTP with SSL/TLS encryption)
Port 22 - Used for SFTP (SSH File Transfer Protocol)
Passive Mode
In passive mode, FTP uses port 21 for commands but transfers data through random high ports (typically 1024-65535) instead of port 20.
Using FTP Clients
If you're using FileZilla, Cyberduck, or similar FTP clients, simply enter port 21 in the port field to connect to a standard FTP server.
