DGS-1510 Series Gigabit Ethernet SmartPro Switch Web UI Reference Guide
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802.1X
802.1X (Port-based and Host-based Access Control)
The IEEE 802.1X standard is a security measure for authorizing and authenticating users to gain access
to various wired or wireless devices on a specified Local Area Network by using a Client and Server
based access control model. This is accomplished by using a RADIUS server to authenticate users trying
to access a network by relaying Extensible Authentication Protocol over LAN (EAPOL) packets between
the Client and the Server.
The following figure represents a basic EAPOL packet:
Figure 9-4 The EAPOL Packet
Utilizing this method, unauthorized devices are restricted from connecting to a LAN through a port to
which the user is connected. EAPOL packets are the only traffic that can be transmitted through the
specific port until authorization is granted. The 802.1X access control method has three roles, each of
which are vital to creating and up keeping a stable and working Access Control security method.
Figure 9-5 The three roles of 802.1X
The following section will explain the three roles of Client, Authenticator and Authentication Server in
greater detail.
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