Cisco Systems 3560X Manual De Usuario
10-48
Catalyst 3750-X and 3560-X Switch Software Configuration Guide
OL-21521-01
Chapter 10 Configuring Switch-Based Authentication
Configuring the Switch for Secure Shell
To return to the default SSH control parameters, use the no ip ssh {timeout | authentication-retries}
global configuration command.
global configuration command.
Displaying the SSH Configuration and Status
To display the SSH server configuration and status, use one or more of the privileged EXEC commands
in
in
:
For more information about these commands, see the “Secure Shell Commands” section in the “Other
Security Features” chapter of the Cisco IOS Security Command Reference, Cisco IOS Release 12.2, at
this URL:
Security Features” chapter of the Cisco IOS Security Command Reference, Cisco IOS Release 12.2, at
this URL:
Step 3
ip ssh
{timeout seconds |
authentication-retries
number}
Configure the SSH control parameters:
•
Specify the time-out value in seconds; the default is 120 seconds. The
range is 0 to 120 seconds. This parameter applies to the SSH
negotiation phase. After the connection is established, the switch uses
the default time-out values of the CLI-based sessions.
range is 0 to 120 seconds. This parameter applies to the SSH
negotiation phase. After the connection is established, the switch uses
the default time-out values of the CLI-based sessions.
By default, up to five simultaneous, encrypted SSH connections for
multiple CLI-based sessions over the network are available (session 0
to session 4). After the execution shell starts, the CLI-based session
time-out value returns to the default of 10 minutes.
multiple CLI-based sessions over the network are available (session 0
to session 4). After the execution shell starts, the CLI-based session
time-out value returns to the default of 10 minutes.
•
Specify the number of times that a client can re-authenticate to the
server. The default is 3; the range is 0 to 5.
server. The default is 3; the range is 0 to 5.
Repeat this step when configuring both parameters.
Step 4
line vty line_number
[ending_line_number]
[ending_line_number]
transport input ssh
(Optional) Configure the virtual terminal line settings.
•
Enter line configuration mode to configure the virtual terminal line
settings. For line_number and ending_line_number, specify a pair of
lines. The range is 0 to 15.
settings. For line_number and ending_line_number, specify a pair of
lines. The range is 0 to 15.
•
Specify that the switch prevent non-SSH Telnet connections. This
limits the router to only SSH connections.
limits the router to only SSH connections.
Step 5
end
Return to privileged EXEC mode.
Step 6
show ip ssh
or
show ssh
Show the version and configuration information for your SSH server.
Show the status of the SSH server connections on the switch.
Step 7
copy running-config startup-config
(Optional) Save your entries in the configuration file.
Command
Purpose
Table 10-6
Commands for Displaying the SSH Server Configuration and Status
Command
Purpose
show ip ssh
Shows the version and configuration information for the SSH server.
show ssh
Shows the status of the SSH server.