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5 Configuration D-Link Web Smart Switch User Manual
Security > Trusted Host
Use Trusted Host function to manage the switch from a remote station. You can enter up to ten designated
management stations networks by defining the IP address/Subnet Mask as seen in the figure below.
Figure 88 Security > Trusted Host
To define a management station IP setting, click the Add Host button and type in the IP address and Subnet
mask. Click the Apply button to save your settings. You may permit only single or a range of IP addresses
by different IP mask setting, the format can be either 192.168.1.1/255.255.255.0 or 192.168.0.1/24. Please
see the example below for permitting the IP range
IP Address Subnet Mask Permitted IP
192.168.0.1 255.255.255.0 192.168.0.1~192.168.0.255
172.17.5.215 255.0.0.0 172.0.0.1~172.255.255.255
To delete the IP address simply click the Delete button, check the unwanted address, and then click Apply.
Security > Safeguard Engine
D-Link’s Safeguard Engine is a robust and innovative technology that automatically throttles the impact of
packet flooding into the switch's CPU. This function helps protect the Web-Smart Switch from being
interrupted by malicious viruses or worm attacks. This option is enabled by default.
Figure 89 – Security > Safeguard Engine
Security > ARP Spoofing Prevention
ARP spoofing, also known as ARP poisoning, is a method to attack an Ethernet network by allowing an
attacker to sniff data frames on a LAN, modifying the traffic, or stopping the traffic (known as a Denial of
Service – DoS attack). The main function of ARP spoofing is to send fake or spoofed ARP messages to an
Ethernet network. It associates the attacker's or random MAC address with the IP address of another node
such as the default gateway. Any traffic meant for that IP address would be mistakenly re-directed to the
node specified by the attacker.
A common DoS attack today can be done by associating a nonexistent or specified MAC address to the IP
address of the network’s default gateway. The malicious attacker only needs to broadcast one gratuitous
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