Port Security - D-Link DES-3250TG User Manual

DES-3250TG Layer 2 Fast Ethernet Switch User's Guide

Port Security

A given port's (or a range of port's) dynamic MAC address
learning can be locked such that the current source MAC
addresses entered into the MAC address forwarding table can
not be changed once the port lock is enabled. The port can be
locked by changing the Admin State pull-down menu to
Enabled, and clicking Apply.
This is a security feature that prevents unauthorized
computers (with source MAC addresses unknown to the switch
prior to locking the port (or ports) from connecting to the
switch's locked ports and gaining access to the network.
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