Vigor3900 Series User’s Guide
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The DoS function helps to detect and mitigates DoS attacks. These include flooding-type
attacks and vulnerability attacks. Flooding-type attacks attempt to use up all your system's
resources while vulnerability attacks try to paralyze the system by offending the
vulnerabilities of the protocol or operation system.
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Available parameters are listed as follows:
Item Description
Broadcast Storm
Defense
Click
Enable
to block the packets attacks coming from
broadcast storm.
Multicast Storm
Defense
Click
Enable
to block the packets attacks coming from
multicast storm.
Unknown Unicast
Storm Defense
Click
Enable
to block the packets attacks coming from
unknown unicast storm.
Unknown Multicast
Storm Defense
Click
Enable
to block the packets attacks coming from
unknown multicast storm.
Storm Filtering Rate
Type a number (1~4096, unit of 64Kpbs) as for the filtering
rate.
The default value for different hardware version will be
varied. Default value of “-1” means no limit in filtering rate.
Refresh
Renew current web page.
Apply
Click it to save the configuration.
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In the
Firewall
group, click the
DOS
Defense
and click the tab of
System
. You will see the
following page. The DoS Defense Engine inspects each incoming packet against the attack
signature database. Any packet that may paralyze the host in the security zone is blocked.
The DoS Defense Engine also monitors traffic behavior. Any anomalous situation violating
the DoS configuration is reported and the attack is mitigated.
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