Command Line Interface

4-34

4
Related Commands
ip telnet port (4-33)
Secure Shell Commands
The Berkley-standard includes remote access tools originally designed for Unix
systems. Some of these tools have also been implemented for Microsoft Windows
and other environments. These tools, including commands such as rlogin (remote
login), rsh (remote shell), and rcp (remote copy), are not secure from hostile attacks.
The Secure Shell (SSH) includes server/client applications intended as a secure
replacement for the older Berkley remote access tools. SSH can also provide
remote management access to this switch as a secure replacement for Telnet.
When a client contacts the switch via the SSH protocol, the switch uses a public-key
that the client must match along with a local user name and password for access
authentication. SSH also encrypts all data transfers passing between the switch and
SSH-enabled management station clients, and ensures that data traveling over the
network arrives unaltered.
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.
Table 4-15 Secure Shell Commands
Command Function Mode Page
ip ssh server Enables the SSH server on the switch GC 4-36
ip ssh timeout Specifies the authentication timeout for the SSH server GC 4-37
ip ssh
authentication-retries
Specifies the number of retries allowed by a client GC 4-37
ip ssh server-key size Sets the SSH server key size GC 4-38
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 4-38
ip ssh crypto host-key
generate
Generates the host key PE 4-39
ip ssh crypto zeroize Clear the host key from RAM PE 4-39
ip ssh save host-key Saves the host key from RAM to flash memory PE 4-40
disconnect Terminates a line connection PE 4-18
show ip ssh Displays the status of the SSH server and the configured values
for authentication timeout and retries
PE 4-40
show ssh Displays the status of current SSH sessions PE 4-41
show public-key Shows the public key for the specified user or for the host PE 4-42
show users Shows SSH users, including privilege level and public key type PE 4-61