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Illustration of starting a passive connection using port 21. FTP may run in active or passive mode, which determines how the data connection is established. (This sense of "mode" is different from that of the MODE command in the FTP protocol.) In active mode, the client starts listening for incoming data connections from the server on port M.
List of FTP server return codes. FTP server return codes always have three digits, and each digit has a special meaning. [1] The first digit denotes whether the response is good, bad or incomplete: Range. Purpose. 1xx. Positive Preliminary reply. The requested action is being initiated; expect another reply before proceeding with a new command.
RFC 959 - File Transfer Protocol (FTP) RFC 1639 - FTP Operation Over Big Address Records (FOOBAR) RFC 2228 - FTP Security Extensions. RFC 2389 - Feature negotiation mechanism for the File Transfer Protocol. RFC 2428 - FTP Extensions for IPv6 and NATs. RFC 2640 - Internationalization of the File Transfer Protocol. RFC 3659 - Extensions to FTP.
FTPS (also known as FTP-SSL and FTP Secure) is an extension to the commonly used File Transfer Protocol (FTP) that adds support for the Transport Layer Security (TLS) and, formerly, the Secure Sockets Layer (SSL, which is now prohibited by RFC7568) cryptographic protocols. FTPS should not be confused with the SSH File Transfer Protocol (SFTP ...
The port numbers in the range from 0 to 1023 (0 to 2 10 − 1) are the well-known ports or system ports. They are used by system processes that provide widely used types of network services. On Unix-like operating systems, a process must execute with superuser privileges to be able to bind a network socket to an IP address using one of the well ...
The "Server port" column indicates the port from which the server transmits data. In the case of FTP, this port differs from the listening port. Some protocols—including FTP, FTP Secure, FASP, and Tsunami—listen on a "control port" or "command port", at which they receive commands from the client.
An FTP server is computer software consisting of one or more programs that can execute commands given by remote client (s) such as receiving, sending, deleting files, creating or removing directories, etc. The software may run as a software component of a program, as a standalone program or even as one or more processes (in the background). An ...
v. t. e. File eXchange Protocol ( FXP or FXSP) is a method of data transfer which uses FTP to transfer data from one remote server to another ( inter-server) without routing this data through the client's connection. Conventional FTP involves a single server and a single client; all data transmission is done between these two.