Dell S4048T, Руководство по настройке

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Removing the RSA Host Keys and Zeroizing
Storage
Use the
crypto key zeroize rsa
command to delete the host key pairs, both the public and private key
information for RSA 1 and or RSA 2 types. Note that when FIPS mode is enabled there is no RSA 1 key pair. Any
memory currently holding these keys is zeroized (written over with zeroes) and the NVRAM location where
the keys are stored for persistence across reboots is also zeroized.
To remove the generated RSA host keys and zeroize the key storage location, use the
crypto key zeroize
rsa
command in CONFIGURATION mode.
Dell(conf)#crypto key zeroize rsa
Configuring When to Re-generate an SSH Key
You can configure the time-based or volume-based rekey threshold for an SSH session. If both threshold
types are configured, the session rekeys when either one of the thresholds is reached.
To configure the time or volume rekey threshold at which to re-generate the SSH key during an SSH session,
use the
ip ssh rekey
[
time
rekey-interval ] [
volume rekey-limit
] command. CONFIGURATION mode.
Configure the following parameters:
• rekey-interval: time-based rekey threshold for an SSH session. The range is from 10 to 1440 minutes.
The default is 60 minutes.
• rekey-limit : volume-based rekey threshold for an SSH session. The range is from 1 to 4096 to
megabytes. The default is 1024 megabytes.
Examples
The following example configures the time-based rekey threshold for an SSH session to 30 minutes.
Dell(conf)#ip ssh rekey time 30
The following example configures the volume-based rekey threshold for an SSH session to 4096 megabytes.
Dell(conf)#ip ssh rekey volume 4096
Configuring the SSH Server Key Exchange
Algorithm
To configure the key exchange algorithm for the SSH server, use the
ip ssh server kex key-exchange-
algorithm
command in CONFIGURATION mode.
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