3Com 4210 PWR Configuration Manual page 41

n
Telnet Configuration
without Authentication
Table 19 Telnet configurations for different authentication modes
Authentication
mode
Scheme Specify to
perform local
authentication
or remote
RADIUS
authentication
Configure user
name and
password
Manage VTY
users
Perform
common
configuration
To improve security and prevent attacks to the unused Sockets, TCP 23 and TCP
22, ports for Telnet and SSH services respectively, will be enabled or disabled after
corresponding configurations.
If the authentication mode is none, TCP 23 will be enabled, and TCP 22 will be
■
disabled.
If the authentication mode is password, and the corresponding password has
■
been set, TCP 23 will be enabled, and TCP 22 will be disabled.
If the authentication mode is scheme, there are three scenarios: when the
■
supported protocol is specified as telnet, TCP 23 will be enabled; when the
supported protocol is specified as ssh, TCP 22 will be enabled; when the
supported protocol is specified as all, both the TCP 23 and TCP 22 port will be
enabled.
Configuration Procedure
Table 20 Telnet configuration with the authentication mode being none
Operation
Enter system view system-view
Enter one or more user-interface vty first-number [
VTY user interface last-number ]
views
Configure not to authentication-mode none
authenticate users
logging into VTY user
interfaces
Telnet configuration
AAA
configuration
specifies
whether to
perform local
authentication
or RADIUS
authentication
Configure user
names and
passwords for
local/RADIUS
users
Set service type
for VTY users
Perform
common Telnet
configuration
Command
Logging in through Telnet
Description
Optional
Local authentication is performed by
default.
Refer to "AAA Configuration" on
page 245.
Required
The user name and password of a
■
local user are configured on the
switch.
The user name and password of a
■
remote user are configured on the
RADIUS server. Refer to the
RADIUS server's user manual.
Required
Optional
Refer to Table 18.
Description
-
-
Required
By default, VTY users are
authenticated after logging in.
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