Operation Manual – File System Management
H3C S5500-EI Series Ethernet Switches
Chapter 2 FTP Configuration
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Chapter 2 FTP Configuration
When configuring FTP, go to these sections for information you are interested in:
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FTP Overview
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Configuring the FTP Client
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Configuring the FTP Server
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Displaying and Maintaining FTP
2.1 FTP Overview
2.1.1 Introduction to FTP
The File Transfer Protocol (FTP) is an application layer protocol for sharing files
between server and client over a TCP/IP network.
FTP uses TCP ports 20 and 21 for file transfer. Port 20 is used to transmit data, and port
21 to transmit control commands. Refer to RFC 959 for details of FTP basic operation.
FTP transmits files in two modes:
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Binary mode for program file transmission
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ASCII mode for text file transmission
2.1.2 Implementation of FTP
FTP adopts the server/client model. Your switch can function either as client or as
server (as shown in
Figure 2-1
). They work in the following way:
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When the switch serves as the FTP client, a PC user first telnets or connects to the
switch through an emulation program, then executes the
ftp
command to establish
the connection to the remote FTP server, and gain access to the files on the server.
If the remote FTP server supports anonymous FTP, the device can log onto it
directly; if not, the device must obtain FTP username and password first to log
onto the remote FTP server.
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When the switch serves as the FTP server, it must be configured with an IP
address so that a user running FTP client program can access it. For the sake of
security, the switch does not support anonymous FTP. Therefore, you must use
an authenticated username and password. By default, authenticated users can
access the root directory of the switch.
