1-3
z Only one user can access an H3C S3100 series Ethernet switch at a given time when the latter
operates as an FTP server.
z Operating as an FTP server, an H3C S3100 series Ethernet switch cannot receive a file whose size
exceeds its storage space. The clients that attempt to upload such a file will be disconnected with
the FTP server due to lack of storage space on the FTP server.
z You cannot access an H3C S3100 series switch operating as an FTP server through Microsoft
Internet Explorer. To do so, use other client software.
To protect unused sockets against attacks, the S3100 Ethernet switch provides the following functions:
z TCP 21 is enabled only when you start the FTP server.
z TCP 21 is disabled when you shut down the FTP server.
Configuring connection idle time
After the idle time is configured, if the server does not receive service requests from a client within a
specified time period, it terminates the connection with the client, thus preventing a user from occupying
the connection for a long time without performing any operation.
Table 1-5 Configure connection idle time
Operation Command Description
Enter system view
system-view
—
Configure the connection idle time for
the FTP server
ftp
timeout
minutes
Optional
30 minutes by default
Disconnecting a specified user
On the FTP server, you can disconnect a specified user from the FTP server to secure the network.
Table 1-6 Disconnect a specified user
Operation Command Description
Enter system view
system-view
—
On the FTP server, disconnect a specified user
from the FTP server
ftp disconnect
user-name Required
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