3Com Switch 7750 Configuration Guide

SSH Terminal Services 775
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CAUTION:
■ When SSH protocol is specified, to ensure a successful login, you must
configure the AAA authentication using the authentication-mode scheme
command.
■ The protocol inbound ssh configuration fails if you configured
authentication-mode password or authentication-mode none. When
you configure SSH protocol successfully for the user interface, then you cannot
configure authentication-mode password or authentication-mode none
any more.
Generating or destroying RSA key pairs
This configuration task is used to generate or destroy the server RSA key pair,
including the host RSA key pair and the server RSA key pair.
■ The name of the host RSA key pair is in the format of switch name plus _Host,
for example, 3Com_Host.
■ The name of the server RSA key pair is in the format of switch name plus
_Server, for example, 3Com_Server.
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Server RSA key pair (3Com_Server) is not used in SSH2.0; therefore, when the rsa
local-key-pair create command is executed, the system only prompts you the
host RSA key pair (3Com_Host) is generated, and does not inform you the
information about the server RSA key pair even if the server RSA key pair is
generated in the background for the purpose of SSH1.x compatibility. You can use
the display rsa local-key-pair public command to display the generated key
pairs.
After you configure the rsa local-key-pair command, the system prompts you to
define the key length.
■ In SSH1.x, the key length is in the range of 512 to 2,048 (bits).
■ In SSH2.0, the key length is in the range of 768 to 2,048 (bits).
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CAUTION:
■ For a successful SSH login, you must generate a local RSA key pair first.
Enter one or multiple user
interface views
user-interface
[ type-keyword ] number
[ ending-number ]
Required
Configure the protocols
supported in the user
interface view(s)
protocol inbound { all |ssh |
telnet }
Optional
By default, the system
supports both Telnet and SSH
Table 609 Configure supported protocols
Operation Command Description
Table 610 Generate or destroy RSA key pairs
Operation Command Description
Enter system view system-view -
Generate a local RSA key pair rsa local-key-pair create Required
Destroy a local RSA key pair rsa local-key-pair destroy Optional