C
HAPTER
24
| Authentication Commands
Secure Shell
– 839 –
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. 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.
2. Provide Host Public Key to Clients – Many SSH client programs
automatically import the host public key during the initial connection
setup with the switch. Otherwise, you need to manually create a known
hosts file on the management station and place the host public key in
it. An entry for a public key in the known hosts file would appear similar
to the following example:
10.1.0.54 1024 35
15684995401867669259333946775054617325313674890836547254
15020245593199868544358361651999923329781766065830956
10825913212890233765468017262725714134287629413011961955667825
95664104869574278881462065194174677298486546861571773939016477
ip ssh timeout Specifies the authentication timeout for the SSH
server
GC
copy tftp public-key Copies the user’s public key from a TFTP server to the
switch
PE
delete public-key Deletes the public key for the specified user PE
disconnect Terminates a line connection PE
ip ssh crypto host-key
generate
Generates the host key PE
ip ssh crypto zeroize Clear the host key from RAM PE
ip ssh save host-key Saves the host key from RAM to flash memory PE
show ip ssh Displays the status of the SSH server and the
configured values for authentication timeout and
retries
PE
show public-key Shows the public key for the specified user or for the
host
PE
show ssh Displays the status of current SSH sessions PE
show users Shows SSH users, including privilege level and public
key type
PE
Table 80: Secure Shell Commands (Continued)
Command Function Mode
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