3Com Switch 7750 Configuration Guide

SSH Terminal Services 777
■ For the password-publickey authentication type: SSH1 client users can access
the switch as long as they pass one of the two authentications. SSH2.0 client
users can access the switch only when they pass both the authentications.
■ For the password authentication, username should be consistent with the
effective username defined in AAA; for the RSA authentication, username is
the SSH local username, so that there is no need to configure a local user in
AAA.
Configuring server SSH attributes
Configuring server SSH authentication timeout time, retry times, server keys
update interval and SSH compatible mode can effectively assure security of SSH
connections by avoiding illegal actions such as malicious password guessing.
Configuring a Client Public Key
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. The client public
keys are generated randomly by the SSH2.0 client. This operation is not required
for password authentication type.
On the other hand, you can import the RSA public key of an SSH user from the
public key file. When the rsa peer-public-key keyname import sshkey filename
command is executed, the system will transform the format of the public key file
created on the client into the public key cryptography standards (PKCS) format
and configure the client public key automatically. Before the configuration above,
the client must upload the public key file of the RSA key to the server by using
FTP/TFTP.
Table 613 Configure server SSH attributes
Operation Command Description
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.
Set server keys update interval ssh server rekey-interval Optional
By default, the system does
not update server keys.
Set SSH server compatible
with SSH1.x client
ssh server
compatible-ssh1x enable
Optional
By default, SSH server is
compatible with SSH1.x client.
Table 614 Configure client public keys
Operation Command Description
Enter system view system-view -
Enter public key view rsa peer-public-key
key-name
Required