4 Configuration DGS-1210 series Metro Ethernet Managed Switch User Manual
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Security > DoS Prevention Settings
The DoS is a malicious attack against a network. This attack is designed to stop a network from functioning
by flooding it with useless traffic. Symptoms of a malicious attack include the inability to access any web site
or a particular web site being unavailable and network performance slowing down.
Figure 4.158 – Security > DoS Prevention Settings
Prevention Settings:
Type: Select the attack types to be prevented. The types are Land Attack, TCP Tine Frag Attack, TCP Null
Scan, TCP Xmascan, TCP SYNFIN, TCP SYN SrcPortless 1024, Ping Death Attack or All.
Action: Set action to Drop or Mirror the selected types of attacks. When Mirror was selected, also specifies
the mirror port.
Mirror Port: Specifies the mirror port to be active.
Priority (0-7): Specifies the priority. The priority range is between 0 and 7.
Rx Rate (64-1024000): Specifies the RX rate. The range is between 64 and 1024000.
State: Specify the state to be enabled or disabled.
Click Apply to make the configurations take effect.
Security > DHCP Server Screening > DHCP Server Screening Port Settings
DHCP Server Screening function allows user to restrict the illegal DHCP server by discarding the DHCP
service from distrusted ports. This page allows you to configure the DHCP Server Screening state for each
port and designed trusted DHCP server IP address.
Figure 4.159– Security > DHCP Server Screening > DHCP Server Screening Port Settings
Illegal Server Log Suppress Duration: Specifies the illegal server log suppress duration for DHCP server
screening port.
From Port/ To Port: Specifies a range of ports to be DHCP server screening port.
State: Specifies the DHCP server screening port to be enabled or disabled.
Click Apply to make the configurations take effect.
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