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Configuring the Secure Shell
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6
• SSH Server-Key Size – Specifies the SSH server key size. (Range: 512-896 bits;
Default: 768)
- 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.
Web – Click Security, SSH, Settings. Enable SSH and adjust the authentication
parameters as required, then click Apply. Note that you must first generate the host
key pair on the SSH Host-Key Settings page before you can enable the SSH server.
Figure 6-7 SSH Server Settings
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.
Console(config)#ip ssh server 25-17
Console(config)#ip ssh timeout 100 25-18
Console(config)#ip ssh authentication-retries 5 25-19
Console(config)#ip ssh server-key size 512 25-19
Console(config)#end
Console#show ip ssh
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SSH Enabled - version 2.0
Negotiation timeout: 120 secs; Authentication retries: 3
Server key size: 768 bits
Console#show ssh
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Information of secure shell
Session Username Version Encrypt method Negotiation state
------- -------- ------- -------------- -----------------
0 admin 2.0 cipher-3des session-started
Console#disconnect 0
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Console#