Command Line Reference Guide

1326 | Security
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Example
Figure 51-6. crypto key generate rsa1 command example
Usage
Information
The host keys are required for key-exchange by the SSH server. If the keys are not found when the
server is enabled (ip ssh server enable), the keys are automatically generated.
This command requires user interaction and will generate a prompt prior to overwriting any existing
host keys.
Related
Commands
debug ip ssh
c e s
Enables collecting SSH debug information.
Syntax
debug ip ssh {client | server}
To disable debugging, use the no debug ip ssh {client | server} command.
Parameters
Defaults
Disabled on both client and server
Command Modes
EXEC
Command
History
Usage
Information
Debug information includes details for key-exchange, authentication, and established session for each
connection.
FTOS#conf
FTOS(conf)#crypto key generate rsa1
Enter key size <1024-2048>. Default<1024>: 1024
Host key already exists. Do you want to replace. [y/n] :y
FTOS(conf)#
Note: Only a user with superuser permissions should generate host-keys.
ip ssh server Enable the SSH server.
show crypto Display SSH host public keys
client Enter the keyword client to enable collecting debug information on the
client.
server Enter the keyword server to enable collecting debug information on the
server.
Version 7.6.1.0 Introduced for S-Series
Version 7.5.1.0 Introduced for C-Series
pre-Version 6.1.1.0 Introduced for E-Series