D-Link DES-3350SR, User Manual

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D-Link DES-3350SR Standalone Layer 3 Switch
72
Port-Based Network Access Control
…
802.1X
Client
802.1X
Client
802.1X
Client
802.1X
Client
802.1X
Client
802.1X
Client
802.1X
Client
802.1X
Client
802.1X
Client
Network access controlled port
Network access uncontrolled port
RADIUS
Server
Ethernet Switch
Figure 7 - 59. Example of Typical Port-Based Configuration
Once the connected device has successfully been authenticated, the Port then becomes Authorized, and all subsequent traffic on the
Port is not subject to access control restriction until an event occurs that causes the Port to become Unauthorized. Hence, if the Port
is actually connected to a shared media LAN segment with more than one attached device, successfully authenticating one of the
attached devices effectively provides access to the LAN for all devices on the shared segment. Clearly, the security offered in this
situation is open to attack.