Configuring Whether First-Time Authentication Is Supported; Establishing A Connection Between The Ssh Client And The Server - 3Com 4500G Family Configuration Manual

Configuring Whether First-time Authentication is Supported

When the device connects to the SSH server as an SSH client, you can configure whether the device
supports first-time authentication.
With first-time authentication, when an SSH client not configured with the server host public key
accesses the server for the first time, the user can continue accessing the server, and save the
host public key on the client. When accessing the server again, the client will use the saved server
host public key to authenticate the server.
Without first-time authentication, a client not configured with the server host public key will deny to
access the server. To access the server, a user must configure in advance the server host public
key locally and specify the public key name for authentication.
Enable the device to support first-time authentication
Follow these steps to enable the device to support first-time authentication:
To do...
Enter system view
Enable the device to support
first-time authentication
Disable first-time authentication
For successful authentication of an SSH client not supporting first-time authentication, the server host
public key must be configured on the client and the public key name must be specified.
Follow these steps to disable first-time authentication:
To do...
Enter system view
Disable first-time authentication
support
Configure the server public key
Specify the host public key name of
the server

Establishing a Connection Between the SSH Client and the Server

Follow these steps to establish the connection between the SSH client and the server:
To do...
Establish a
connection between
the SSH client and
server, and specify
the public key
algorithm, preferred
encryption algorithms,
Use the command...
system-view
ssh client first-time enable
Use the command...
system-view
undo ssh client first-time
Refer to Configuring a Client Public
Key
ssh client authentication server
server assign publickey keyname
ssh2 server [ port-number ] [ identity-key { dsa |
rsa } | prefer-ctos-cipher { aes128 | des } |
prefer-ctos-hmac { md5 | md5-96 | sha1 | sha1-96 }
For an IPv4
| prefer-kex { dh-group-exchange | dh-group1 |
server
dh-group14 } | prefer-stoc-cipher { aes128 | des } |
prefer-stoc-hmac { md5 | md5-96 | sha1 |
sha1-96 } ] *
1-10
—
Optional
By default, first-time authentication is
supported on a client.
—
Optional
By default, first-time authentication
is supported on a client.
Required
The method of configuring server
public key on the client is similar to
that of configuring client public key
on the server.
Required
Use the command...
Remarks
Remarks
Remarks
Required
Use either
command in
user view.