Port Security - Planet Networking & Communication WGSD-1022 User Manual

4.9.5 Port Security

Work security screen (see figure 4-43) can be increased by limiting access on a specific port only to
users with specific MAC addresses. MAC addresses can be dynamically learned or statically
configured. Locked port security monitors both received and learned packets that are received on
specific ports. Access to the locked port is limited to users with specific MAC addresses. These
addresses are either manually defined on the port, or learned on that port up to the point when it is
locked.
When a packet is received on a locked port, and the packet source MAC address is not tied to that port
(either it was learned on a different port, or it is unknown to the system), the protection mechanism is
invoked, and can provide various options.
Unauthorized packets arriving at a locked port are either:
Forwarded, Discarded with no trap, Discarded with a trap, Cause the port to be shut down.
Locked port security also enables storing a list of MAC addresses in the configuration file. The MAC
address list can be restored after the device has been reset.
Figure 4-43 Port Security screen