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Configuring FTP
File Transfer Protocol (FTP) is an application layer protocol based on the client/server model. It is used to
transfer files from one host to another over an IP network.
FTP server uses TCP port 20 to transfer data and TCP port 21 to transfer control commands. For more
information about FTP, see RFC 959.
FTP supports the following transfer modes:
• Binary mode—Used to transfer image files, such as .bin, and .btm files.
• ASCII mode—Used to transfer text files, such as .txt, .bat, and .cfg files.
By default, the FTP server uses binary mode.
FTP can operate in either of the following modes:
• Active mode (PORT)—The FTP server initiates the TCP connection. This mode is not suitable when
the FTP client is behind a firewall, for example, when the FTP client resides in a private network.
• Passive mode (PASV)—The FTP client initiates the TCP connection. This mode is not suitable when
the server does not allow the client to use a random unprivileged port greater than 1024.
FTP operation mode varies depending on the FTP client program.
The device can act as the FTP server or FTP client. Make sure the FTP server and the FTP client can reach
each other before establishing the FTP connection.
Figure 24 FTP application scenario
FIPS compliance
The device supports the FIPS mode that complies with NIST FIPS 140-2 requirements. Support for features,
commands, and parameters might differ in FIPS mode and non-FIPS mode. For more information about
FIPS mode, see Security Configuration Guide.
FTP is not supported in FIPS mode.
Using the device as an FTP server
To use the device as an FTP server, you must enable the FTP server and configure authentication and
authorization on the device. Other commands are optional.
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