Accton Technology ES5508 manual 245

System Management Commands 4

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.

Note: The switch supports both SSH Version 1.5 and 2.0 clients.

Table 4-15 Secure Shell Commands

Command	Function	Mode	Page
ip ssh server	Enables the SSH server on the switch	GC	4-35
ip ssh timeout	Specifies the authentication timeout for the SSH server	GC	4-35
ip ssh	Specifies the number of retries allowed by a client	GC	4-36
authentication-retries
ip ssh server-key size	Sets the SSH server key size	GC	4-36
copy tftp public-key	Copies the user’s public key from a TFTP server to the switch	PE	4-63
delete public-key	Deletes the public key for the specified user	PE	4-37
ip ssh crypto host-key	Generates the host key	PE	4-37
generate
ip ssh crypto zeroize	Clear the host key from RAM	PE	4-38
ip ssh save host-key	Saves the host key from RAM to flash memory	PE	4-39
disconnect	Terminates a line connection	PE	4-17
show ip ssh	Displays the status of the SSH server and the configured values	PE	4-39
	for authentication timeout and retries
show ssh	Displays the status of current SSH sessions	PE	4-39
show public-key	Shows the public key for the specified user or for the host	PE	4-40
show users	Shows SSH users, including privilege level and public key type	PE	4-61

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 4-69.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

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