Terminology - HP ProCurve 2910al Access Security Manual

ProCurve
Switch
(SSH
Server)
Figure 7-2. Switch/User Authentication
Switch SSH and User Password Authentication . This option is a subset
of the client public-key authentication shown in figure 7-1. It occurs if the
switch has SSH enabled but does not have login access (login public-key)
configured to authenticate the client's key. As in figure 7-1, the switch authen­
ticates itself to SSH clients. Users on SSH clients then authenticate themselves
to the switch (login and/or enable levels) by providing passwords stored
locally on the switch or on a TACACS+ or RADIUS server. However, the client
does not use a key to authenticate itself to the switch.
1. Switch-to-Client SSH
2. User-to-Switch (login password and
enable password authentication)
options:
– Local
– TACACS+

Terminology

SSH Server: An ProCurve switch with SSH enabled.
■
Key Pair: A pair of keys generated by the switch or an SSH client
■
application. Each pair includes a public key, that can be read by anyone
and a private key held internally in the switch or by a client.
■ PEM (Privacy Enhanced Mode): Refers to an ASCII-formatted client
public-key that has been encoded for portability and efficiency. SSHv2
client public-keys are typically stored in the PEM format. See figure 7-3
for an example of PEM-encoded ASCII keys.
Private Key: An internally generated key used in the authentication
■
process. A private key generated by the switch is not accessible for
viewing or copying. A private key generated by an SSH client application
is typically stored in a file on the client device and, together with its public
key counterpart, can be copied and stored on multiple devices.
■ Public Key: An internally generated counterpart to a private key. A
device's public key is used to authenticate the device to other devices.
Enable Level: Manager privileges on the switch.
■
Login Level: Operator privileges on the switch.
■
Configuring Secure Shell (SSH)

Terminology

SSH
Client
Work-
Station
7-3