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Secure Shell Commands
41-15
41
Secure Shell Commands
This section describes the commands used to configure the SSH server. Note that
you also need to install a SSH client on the management station when using this
protocol to configure the switch.
Note:
The switch supports both SSH Version 1.5 and 2.0 clients.
Configuration Guidelines
The SSH server on this switch supports both password and public key
authentication. If password authentication is specified by the SSH client, then the
password can be authenticated either locally or via a RADIUS or TACACS+ remote
authentication server, as specified by the authentication login command on
page 41-3. If public key authentication is specified by the client, then you must
configure authentication keys on both the client and the switch as described in the
following section. Note that regardless of whether you use public key or password
authentication, you still have to generate authentication keys on the switch and
enable the SSH server.
To use the SSH server, complete these steps:
1. Generate a Host Key Pair – Use the ip ssh crypto host-key generate
command to create a host public/private key pair.
Table 41-10 Secure Shell Commands
Command Function Mode Page
ip ssh server Enables the SSH server on the switch GC 41-17
ip ssh timeout Specifies the authentication timeout for the SSH server GC 41-18
ip ssh
authentication-retries
Specifies the number of retries allowed by a client GC 41-19
ip ssh server-key size Sets the SSH server key size GC 41-19
copy tftp public-key Copies the user’s public key from a TFTP server to the switch PE 35-2
delete public-key Deletes the public key for the specified user PE 41-20
ip ssh crypto host-key
generate
Generates the host key PE 41-20
ip ssh crypto zeroize Clear the host key from RAM PE 41-21
ip ssh save host-key Saves the host key from RAM to flash memory PE 41-21
disconnect Terminates a line connection PE 36-9
show ip ssh Displays the status of the SSH server and the configured values
for authentication timeout and retries
PE 41-22
show ssh Displays the status of current SSH sessions PE 41-22
show public-key Shows the public key for the specified user or for the host PE 41-23
show users Shows SSH users, including privilege level and public key type PE 34-7