U
SER
A
UTHENTICATION
3-81
CLI – This example enables SSH, sets the authentication parameters, and
displays the current configuration. It shows that the administrator has
made a connection via SHH, and then disables this connection.
Generating the Host Key Pair
A host public/private key pair is used to provide secure communications
between an SSH client and the switch. After generating this key pair, you
must provide the host public key to SSH clients and import the client’s
public key to the switch as described in the proceeding section (Command
Usage).
Field Attributes
• Public-Key of Host-Key – The public key for the host.
- RSA: The first field indicates the size of the host key (e.g., 1024), the
second field is the encoded public exponent (e.g., 65537), and the
last string is the encoded modulus.
- DSA: The first field indicates that the encryption method used by
SSH is based on the Digital Signature Standard (DSS). The last string
is the encoded modulus.
Console(config)#ip ssh server 4-48
Console(config)#ip ssh timeout 100 4-49
Console(config)#ip ssh authentication-retries 5 4-50
Console(config)#ip ssh server-key size 512 4-51
Console(config)#end
Console#show ip ssh 4-54
SSH Enabled - version 2.0
Negotiation timeout: 120 secs; Authentication retries: 3
Server key size: 768 bits
Console#show ssh 4-54
Information of secure shell
Session Username Version Encrypt method Negotiation state
------- -------- ------- -------------- -----------------
0 admin 2.0 cipher-3des session-started
Console#disconnect 0 4-24
Console#
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