Dos Defense - Draytek Vigor3900 User Manual

Item
Packet Inspection
Packets Number
Apply
Cancel
After finished the above settings, click Apply to save the configuration.
4 . 5 . 2 D o S D e f e n s e
4 . 5 . 2 D o S D e f e n s e
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.
4 4 . . 5 5 . . 2 2 . . 1 1 S S w w
Description


The above three policies also can be configured in
Firewall>>Filter Setup>>IP Filter/Application Filter.
Disable – No inspection will be performed.
Enable – Packet inspection will be performed.
If Packet Inspection is enabled, choose a packet number for
filtering. Available settings are from 4 to 16. For example,
"8" is selected as packet number setting. It means only the
former 8 packets will be filtered and inspected by Firewall
rule. Others are allowed to pass through without any
inspection.
Click it to save the configuration.
Click it to discard the settings configured in this page.
i i t t c c h h
query passing through Vigor router's firewall.
Pass Reply of Port Redirection /DMZ – Check the
box to make the outgoing packets processed by Port
Redirection/DMZ passing through Vigor router's
firewall.
Enable Syslog – Check the box to make related
information for the blocked packets being recorded in
Syslog.
210
Vigor3900 Series User's Guide