c. For additional security, you can set the 'Require Public Key' to Enable. This
ensures that SSH access is only possible by using the RSA key and not by using
user name and password.
d. Configure the other SSH parameters as required. For a description of these
parameters, see SSH Parameters on page 453.
e. Click Submit.
3. Start the PuTTY Configuration program, and then do the following:
a. In the 'Category' tree, drill down to Connection, then SSH, and then Auth; the
'Options controlling SSH authentication' pane appears.
b. Under the 'Authentication parameters' group, click Browse and then locate the
private key file that you created and saved in Step 4.
4. Connect to the device with SSH using the username "Admin"; RSA key negotiation
occurs automatically and no password is required.
 To configure RSA public keys for Linux (using OpenSSH 4.3):
1. Run the following command to create a new key in the admin.key file and to save the
public portion to the admin.key.pub file:
ssh-keygen -f admin.key -N "" -b 1024
2. Open the admin.key.pub file, and then copy the encoded string from "ssh-rsa" to the
white space.
3. Open the Telnet/SSH Settings page (Configuration tab > System menu >
Management > Telnet/SSH Settings), and then paste the value copied in Step 2 into
the 'Admin Key' field.
4. Click Submit.
5. Connect to the device with SSH, using the following command:
ssh -i admin.key xx.xx.xx.xx
where xx.xx.xx.xx is the device's IP address. RSA-key negotiation occurs
automatically and no password is required.
5.3 Establishing a CLI Session
The procedure below describes how to establish a CLI session with the device.
Notes:
• The default login username and password are both "Admin" (case-
sensitive).
• Only the primary User Account, which has Security Administration
access level (200) can access the device using Telnet. For configuring
the username and password, see Configuring Web User Accounts on
page 62.
 To establish a CLI session with the device:
1. Establish a Telnet or SSH session with the device using its OAMP IP address.
2. Log in to the session using the username and password assigned to the Admin user of
the Web interface.
3. At the login prompt, type the username, and then press Enter:
login: Admin
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