Westermo MDI-112-F4G - Manual (Page 123)

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Filter Attach (Access Control List)
After configured the ACL filter rules, remember associate this filter with the
physical ports. Then the port has the capability to filter traffic/attach based on
the packets lost.
Note: Different model may support different access control capability, the above
commands are applied to generic managed switch. But, due to the hardware
restriction, some of the above command may not support in your product. Please
check the web and CLI of your product.
4.10.2 IEEE 802.1x
802.1X configuration
IEEE 802.1X is the protocol that performing authentication to obtain access to IEEE
802 LANs. It is port-base network access control and the switch could control
which connection should be available or not.