HP procurve 2500 Manuale Utente

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Enhancements in Release F.04.08
Configuring Secure Shell (SSH)
To Generate or Erase the Switch’s Public/Private RSA Host Key Pair. 
Because the host key 
pair is stored in flash instead of the running-config file, it is not necessary to use 
write memory to save 
the key pair. Erasing the key pair automatically disables SSH.
Syntax:
crypto key generate [rsa]
Generates a public/private key pair for
the switch. If a switch key pair already exists, replaces
it with a new key pair. (See the Note, above.)
crypto key zeroize [rsa]
Erases the switch’s public/private key pair
and disables SSH operation.
show ip ssh host-public-key 
Displays switch’s public key as an ASCII string
.
     [ babble ] 
Displays a hash of the switch’s public key in phonetic
format. (See 
     [ fingerprint ]
Displays a "fingerprint" of the switch’s public key in
hexadecimal format. (See "Displaying the Public Key"
on page 
For example, to generate and display a new key:
Figure 31.   Example of Generating a Public/Private Host Key Pair for the Switch
N o t e s
"Zeroizing" the switch’s key automatically disables SSH (sets 
IP SSH to No). Thus, if you zeroize the 
key and then generate a new key, you must also re-enable SSH with the 
ip ssh command before the 
switch can resume SSH operation.
Host Public Key 
for the Switch