Planet IGSW-2840, User Manual

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User’s Manual of IGSW-2840
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5.12.8 Secure Shell Commands
This section describes the commands used to configure the SSH server. However, note that you also need to install a SSH
client on the management station when using this protocol to configure the switch.
The Industrial Managed Switch supports both SSH Version 1.5 and 2.0.
Command Function Mode
ip ssh server Enables the SSH server on the switch GC
ip ssh timeout Specifies the authentication timeout for the SSH server GC
ip ssh authentication-retries Specifies the number of retries allowed by a client GC
ip ssh server-key size Sets the SSH server key size 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
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
disconnect Terminates a line connection PE
show ip ssh Displays the status of the SSH server and the configured
valuesfor authentication timeout and retries
PE
show ssh Displays the status of current SSH sessions PE
show public-key Shows the public key for the specified user or for the host PE
show users Shows SSH users, including privilege level and public key type PE
Table 5-36 Secure Shell Commands
Configuration Guidelines
The SSH server on this Industrial Managed 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
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 Industrial Managed 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 Industrial Managed 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