DGS-1510 Series Gigabit Ethernet SmartPro Switch Web UI Reference Guide
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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 9-6 The Authentication Server
Authenticator
The Authenticator (the Switch) is an intermediary between the Authentication Server and the Client. The
Authenticator serves two purposes when utilizing the 802.1X function. 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.
Figure 9-7 The Authenticator
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