ZyXEL Communications ES-2024 Series, User Manual, Page: 133 / 282

ES-2024 Series User’s Guide
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H A P T E R
18
Port Authentication
This chapter describes the IEEE 802.1x methods.
18.1 Port Authentication Overview
Port authentication is a way to validate access to ports on the Switch to clients based on an
external server (authentication server). The Switch supports
IEEE 802.1x
2
authentication, in
which an authentication server validates access to a port based on a username and password
provided by the user.
This type of authentication uses the RADIUS (Remote Authentication Dial In User Service,
RFC 2138, 2139) protocol to validate users. See
Section 22.1.2 on page 158 for more
information on configuring your RADIUS server settings.
18.1.1 IEEE 802.1x Authentication
The following figure illustrates how a client connecting to a IEEE 802.1x authentication
enabled port goes through a validation process. The Switch prompts the client for login
information in the form of a user name and password. When the client provides the login
credentials, the Switch sends an authentication request to a RADIUS server. The RADIUS
server validates whether this client is allowed access to the port.
2. At the time of writing, IEEE 802.1x is not supported by all operating systems. See your operating system
documentation. If your operating system does not support 802.1x, then you may need to install 802.1x client
software.