H3C Technologies H3C S12500 Series Switches - Manual (Page 78)

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Configuring FTP
File Transfer Protocol (FTP) is an application layer protocol that transfers files between server and client
over a TCP/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.
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.
• 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 adopts the client/server model. Your switch can function either as the client or the server, as shown
in
Figure 26 .
Figure 26 FTP application scenario
NOTE:
If you enable FIPS mode and reboot the switch, the FTP server function is disabled. For more information
about FIPS mode, see
Security Configuration Guide.
Using the device as an FTP client
To connect to an FTP server or enter FTP client view, make sure the following requirements are met:
• You have level-3 (Manage) user privileges on the device. In FTP client view, whether a directory or
file management command can be successfully executed depends on the authorization set on the
FTP server.
• The device and the FTP server can reach each other.
• You have a user account (including the username, password, and authorization) on the FTP server.
If the FTP server supports anonymous FTP, you can directly access the FTP server without a username
and password.
Establishing an FTP connection
Before you can access the FTP server, use the ftp command in user view or use the open command in FTP
client view to establish a connection to the FTP server.