Chapter 8
| Authentication Commands
Secure Shell
– 237 –
Command Mode
Global Configuration
Command Usage
â—†
The SSH server supports up to eight client sessions. The maximum number of
client sessions includes both current Telnet sessions and SSH sessions.
â—†
The SSH server uses DSA or RSA for key exchange when the client first
establishes a connection with the switch, and then negotiates with the client to
select either DES (56-bit) or 3DES (168-bit) for data encryption.
â—†
You must generate DSA and RSA host keys before enabling the SSH server.
Example
Console#ip ssh crypto host-key generate dsa
Console#configure
Console(config)#ip ssh server
Console(config)#
Related Commands
ip ssh crypto host-key generate (239)
show ssh (242)
ip ssh server-key size
This command sets the SSH server key size. Use the
no
form to restore the default
setting.
Syntax
ip ssh server-key size
key-size
no ip ssh server-key size
key-size – The size of server key. (Range: 512-896 bits)
Default Setting
768 bits
Command Mode
Global Configuration
Command Usage
The server key is a private key that is never shared outside the switch.
The host key is shared with the SSH client, and is fixed at 1024 bits.
Example
Console(config)#ip ssh server-key size 512
Console(config)#
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