Choose the menu Network SecurityβARP InspectionβARP Statistics to load the following
page.
Figure 12-15 ARP Statistics
The following entries are displayed on this screen:
Auto Refresh
Enable/Disable the Auto Refresh feature.
resh Interval: Specify the refresh interval to display the ARP Statistics.
Illegal ARP Packet
Displays the port number.
Indicates the port is an ARP Trusted Port or not.
Displays the number of the received illegal ARP packets.
12.3 DoS Defend
DoS (Denial of Service) Attack is to occupy the network bandwidth maliciously by the network
attackers or the evil programs sending a lot of service requests to the Host, which incurs an
abnormal service or even breakdown of the network.
With DoS Defend function enabled, the switch can analyze the specific fields of the IP packets and
distinguish the malicious DoS attack packets. Upon detecting the packets, the switch will discard
the illegal packets directly and limit the transmission rate of the legal packets if the over legal
packets may incur a breakdown of the network. The switch can defend a few types of DoS attack
listed in the following table.
192
