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Netgear GS108Tv2 Manual

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GS108T and GS110TP Smart Switch Software Administration Manual
Configuration Examples B-13
v1.0, April 2010
The ports of an 802.1X authenticator switch provide the means in which it can offer services to
other systems reachable via the LAN. Port-based network access control allows the operation of a
switch’s ports to be controlled in order to ensure that access to its services is only permitted by
systems that are authorized to do so.
Port access control provides a means of preventing unauthorized access by supplicants to the
services offered by a system. Control over the access to a switch and the LAN to which it is
connected can be desirable in order to restrict access to publicly accessible bridge ports or to
restrict access to departmental LANs.
Access control is achieved by enforcing authentication of supplicants that are attached to an
authenticator's controlled ports. The result of the authentication process determines whether the
supplicant is authorized to access services on that controlled port.
A Port Access Entity (PAE) is able to adopt one of two distinct roles within an access control
interaction:
1. Authenticator: A Port that enforces authentication before allowing access to services
available via that Port.
2. Supplicant: A Port that attempts to access services offered by the Authenticator.
Additionally, there exists a third role:
3. Authentication server: Performs the authentication function necessary to check the
credentials of the Supplicant on behalf of the Authenticator.
All three roles are required in order to complete an authentication exchange.
GS108T and GS110TP switches support the Authenticator role only, in which the PAE is
responsible for communicating with the Supplicant. The Authenticator PAE is also responsible for
submitting the information received from the Supplicant to the Authentication Server in order for
the credentials to be checked, which will determine the authorization state of the Port. The
Authenticator PAE controls the authorized/unauthorized state of the controlled Port depending on
the outcome of the RADIUS-based authentication process.
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