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Chapter 5 Network Tab
DoS Protection 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 Protection function enabled, the device can analyze
the specific fields of the IP packets and distinguish the malicious DoS attack
packets. Upon detecting the packets, the device 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 hosts sending these
packets will be added into the Blocked DoS Host List. The device can defend
a few types of DoS attack such as ICMP_FLOOD, UDP_FLOOD and
TCP_SYN_FLOOD.
Packets Statistics Interval - Select a value between 5 and 60 seconds
from the drop-down list. The default value is 10. The value indicates the
time interval of the packets statistics. The result of the statistic is used for
analysis by ICMP-Flood, UDP Flood and TCP-SYN Flood.
ICMP_FLOOD Attack Filter - Enter a value between 5 and 3600. The
default value is 50. When the current ICMP-FLOOD Packets number is
beyond the set value, the device will start up the blocking function
immediately.
UDP_FLOOD Attack Filter - Enter a value between 5 and 3600. The default
value is 500. When the current UPD-FLOOD Packets number is beyond the
set value, the device will start up the blocking function immediately.
TCP_SYN_FLOOD Attack Filter - Enter a value between 5 and 3600. The
default value is 50. When the current TCP-SYN-FLOOD Packets numbers is
beyond the set value, the Device will start up the blocking function
immediately.
Blocked DoS
Host List
Click Blocked DoS Host List to display the blocked DoS host table including
host IP and host MAC. Click Refresh to renewal the table list. Click Clear to
release all the blocked hosts. If you want to release one or some of the
blocked hosts, select them and Click Unlock.
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