3Com 4200G 24-Port - Configuring the SSH Management Functions

1-7
To do... Use the command... Remarks
Configure the authentication
mode as scheme
authentication-mode scheme
[ command-authorization ]
Required
By default, the user interface
authentication mode is
password.
Specify the supported
protocol(s)
protocol inbound { all |ssh }
Optional
By default, both Telnet and
SSH are supported.
z If you have configured a user interface to support SSH protocol, you must configure AAA
authentication for the user interface by using the authentication-mode scheme command to
ensure successful login.
z On a user interface, if the authentication-mode password or authentication-mode none
command has been executed, the protocol inbound ssh command is not available. Similarly, if
the protocol inbound ssh command has been executed, the authentication-mode password
and authentication-mode none commands are not available.
Configuring the SSH Management Functions
The SSH server provides a number of management functions to prevent illegal operations such as
malicious password guess, guaranteeing the security of SSH connections. You can specify the IP
address or the interface corresponding to the IP address for the SSH server to provide SSH access
services for clients. In this way, the SSH client accesses the SSH server only using the specified IP
address. This increases the service manageability when the SSH server has multiple interfaces and IP
addresses.
Follow these steps to configure SSH management functions:
To do... Use the command... Remarks
Enter system view
system-view
—
Set the SSH authentication
timeout time
ssh server timeout seconds
Optional
By default, the SSH
authentication timeout time is 60
seconds.
Set the number of SSH
authentication retry attempts
ssh server
authentication-retries times
Optional
By default, the number of SSH
authentication retry attempts is 3.
Set the RSA server key update
interval
ssh server rekey-interval
hours
Optional
By default, the system does not
update the RSA server keys.
Configure a login header
header shell text
Optional
By default, no login header is
configured.