3Com 4500 PWR 26-Port Configuration Manual page 675

Destroy the RSA key pair
Creating an SSH User and Specify
This task is to create an SSH user and specify an authentication type. Specifying an authentication type
for a new user is a must to get the user login.
An SSH user is represented as a set of use
with the SSH username. When a user logs in to the SSH server from the SSH client, a username is
required so that the server can looks up the database for matching the username. If a match is found, it
authenticates the user using the authentication mode specified in the attribute set. If not, it tears down
the connection.
To prevent illegal users from logging in to the device, SSH supports the authentication m
password, pu blickey, a
Password authe
SSH uses the authentication function of
Base d on the AAA authentication s
l ocal authentication, the SSH serve
r emote authentication, the user info
server) and authentication is imp
authentication server. For AAA details, refer to AAA Operation.
Publickey authentication
Publickey authentication provides
At present, the device supports RSA for publickey authentication. Aft
im plemented automatically without asking you to enter the password. In this mode, you need to create a
key pair on each client, and configure each client's public key on the server. This may be complicated
when multiple SSH clients want to access one SSH server in the network.
Password-publickey authentication
An SSH user must pass both types of authentication before logging in. In this mode, you do not need to
create a key pair on each client. You can configure the clients to use the same key pair that is created
on one client for publickey authentication. With the AAA function in password authentication, the level of
commands available to a logged-in SSH user is determined by the AAA scheme..
Follow these steps to configure an SSH user and specify an authentication type for the user:
To do...
Enter system view
Specify
authentication type for all SSH
users
To do...
nd password-publ
ntication
cheme, password authentication
r saves the user inform
rmation is
lemented through th
more secure SSH connections t
system-view
ssh authentication-type default
{ all | password |
the default
password-publickey |
publickey }
ssh user username
Use the command...
public-key local destroy rsa
ing an Authentication Type
r attributes on the SSH server. This set is uniquely identified
ickey.
AAA to authenticate the pa
ation and im
saved on an authentic
e cooperati
Use the command...
Remarks
Optional
sswo rd of the user that is lo
can b e done locally or remotely
plements the authentication. F
ation server (such
on of the SSH server and
ha n password authentication
er configuration, authentication
Remarks
—
Use either command.
By default, no SSH user is
created and no authentication
type is specified.
Note that: If both commands
odes of
gging in.
. For
or
as a RADIUS
the
does.
is