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DGS-3400 Series Layer 2 Gigabit Ethernet Managed Switch
231
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 6 - 12 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 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. (DGS-3400 Web Management Tool)
2. The 802.1X settings must be implemented by port (Security / 802.1X / Configure 802.1X Authenticator Parameter)
3. A RADIUS server must be configured on the Switch. (Security / 802.1X / Authentic RADIUS Server)
Figure 6 - 13 The Authenticator
Client
The Client is simply the endstation that wishes to gain access to the LAN or switch services. All endstations must be running
software that is compliant with the 802.1X protocol. For users running Windows XP, that software is included within the
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