3Com Switch 4200G Configuration Guide

SSH Terminal Services 313
Configuring authentication type
New users must specify authentication type. Otherwise, they cannot access the
switch.
CAUTION:
■ If RSA authentication type is defined, then the RSA public key of the client user
must be configured on the switch.
■ By default, no authentication type is specified for a new user, so they cannot
access the switch.
■ For the password-publickey authentication type: SSHv1 client users can access
the switch as long as they pass one of the two authentications. SSHv2 client users
can access the switch only when they pass both the authentications.
Configuring server SSH attributes
Configuring server SSH authentication timeout time and retry times can effectively
assure security of SSH connections and avoid illegal actions.
Configuring client public keys
You can configure RSA public keys for client users on the switch and specify RSA
private keys, which correspond to the public keys, on the client. Then client keys are
generated randomly by the SSH2.0 client software. This operation is not required for
password authentication type.
Table 266 Configure authentication type
Operation Command Remarks
Enter system view system-view -
Configure authentication type for
SSH users
ssh user username
authentication-type { password |
password-publickey | rsa| all }
Required
Table 267 Configure server SSH attributes
Operation Command Remarks
Enter system view system-view -
Set SSH authentication
timeout time
ssh server timeout seconds Optional
The timeout time defaults to
60 seconds.
Set SSH authentication retry
times
ssh server
authentication-retries times
Optional
The retry times defaults to 3.
Table 268 Configure client public keys
Operation Command Remarks
Enter system view system-view -
Enter public key view rsa peer-public-key
key-name
Required
Enter public key edit view public-key-code begin You can key in a blank space
between characters, since the
system can remove the blank
space automatically. But the
public key should be
composed of hexadecimal
characters.
Return to public key view from
public key edit view
public-key-code end The system saves public key
data when exiting from public
key edit view