User manual

ENGLISH
53
Authentication Server
The Authentication Server is a remote device that is connected to the same network as the Client and
Authenticator, must be running a RADIUS Server program and must be configured properly on the Authenticator
(Switch). Clients connected to a port on the Switch must be authenticated by the Authentication Server (RADIUS)
before attaining any services offered by the Switch on the LAN. The role of the Authentication Server is to certify
the identity of the Client attempting to access the network by exchanging secure information between the RADIUS
server and the Client through EAPOL packets and, in turn, informs the Switch whether or not the Client is granted
access to the LAN and/or switches services.
Figure 9- 3. The Authentication Server
Authenticator
The Authenticator (the Switch) is an intermediary between the Authentication Server and the Client. The
Authenticator servers two purposes when utilizing 802.1x. The first purpose is to request certification information
from the Client through EAPOL packets, which is the only information allowed to pass through the Authenticator
before access is granted to the Client. The second purpose of the Authenticator is to verify the information
gathered from the Client with the Authentication Server, and to then relay that information back to the Client.
Three steps must be implemented on the Switch to properly configure the Authenticator.
1. The 802.1x State must be Enabled. (Web Management Tool)
2. The 802.1x settings must be implemented by port (Security / 802.1x / Configure 802.1X Authenticator
Settings and 802.1X Capability Settings)
3. A RADIUS server must be configured on the Switch. (Security / 802.1x / RADIUS Server)
Figure 9- 4. The Authenticator