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Chapter 8 User Authentication
48 Avaya P334T-ML User’s Guide
SCP server must be installed on the management station. After defining users on the
SCP server, the device acts as an SCP client.
The procedure described in the “Introduction to SSH“ on page 45 is used with the
roles of the P330 and the client computer reversed.
To accomplish secured transfers, a P330 launches a local SSH client via the CLI in
order to establish a secured channel to the secured file server. The P330
authenticates itself to the server by providing a user name and password. With a
Windows-based SSH server (WinSSHD), the user name provided must be a defined
user on the Windows machine with read/write privileges. The files transferred via
SCP are saved in the “C:\Documents and Settings\username” directory.
The network element performs file transfer in unattended mode.
L The P330 doesn't block SCP traffic from users not on the allowed managers list,
because it is the SSH client. In addition, the P330 doesn't prompt the user to
accept the Server’s fingerprint nor warns the user if the fingerprint from an IP
address has changed.
For information on SCP file transfer commands, refer to “Uploading and
Downloading Device Configurations and Images“on page 63.
RADIUS
Introduction to RADIUS
User accounts are typically maintained locally on the switch. Therefore, if a site
contains multiple Avaya Switches, it is necessary to configure each switch with its
own user accounts. Additionally, if for example a 'read-write' user has to be
changed into a 'read-only' user, you must change all the 'read-write' passwords
configured locally in every switch, in order to prevent him from accessing this level.
This is obviously not effective management. A better solution is to have all of the
user login information kept in a central location where all the switches can access it.
P330 features such a solution: the Remote Authentication Dial-In User Service
(RADIUS).
A RADIUS authentication server is installed on a central computer at the customer's
site. On this server user authentication (account) information is configured that
provides various degrees of access to the switch. The P330 will run as a RADIUS
client. When a user attempts to log into the switch, if there is no local user account
for the entered user name and password, then the switch will send an
Authentication Request to the RADIUS server in an attempt to authenticate the user
remotely. If the user name and password are authenticated, then the RADIUS server
responds to the switch with an Authentication Acknowledgement that includes
information on the user's privileges ('administrator', 'read-write', or 'read-only'),
and the user is allowed to gain access to the switch. If the user is not authenticated,
then an Authentication Reject is sent to the switch and the user is not allowed access