Ftp Overview; Introduction To Ftp; Implementation Of Ftp - 3Com MSR 50 Series Configuration Manual

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FTP Overview

Introduction to FTP

Implementation of FTP

FTP C
ONFIGURATION
When configuring FTP, go to these sections for information you are interested in:
"FTP Overview" on page 2105
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"File System Management Configuration" on page 2095
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"Configuring the FTP Server" on page 2110
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"Displaying and maintaining FTP" on page 2112
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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:
Binary mode for program file transmission
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ASCII mode for text file transmission
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FTP adopts the server/client model. Your device can function either as client or as
server (as shown in Figure
When the device serves as the FTP client, a PC user first telnets or connects to
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the device 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.
When the device serves as the FTP server, it must be configured with an IP
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address so that a user running FTP client program can access it. For the sake of
security, the device 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 device.
Figure 627 Network diagram for FTP
Device
627). They work in the following way:
Internet
PC