Draytek VIGOR 3300 User Manual page 86

DoS Defense
Enable SYN Flood Defense Activates the SYN flood defense function. If the amount of
Enable UDP Flood Defense Activates the UDP flood defense function. If the amount of
Enable ICMP Flood
Defense
Enable Port Scan Detection Activates the Port Scan detection function. Port scan sends
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Enables or disables the DoS Defense function. The default
value is Disable.
TCP SYN packets from the Internet exceeds the user-defined
threshold value, the router will be forced to randomly discard
the subsequent TCP SYN packets within the user-defined
timeout period. The default setting for threshold and timeout are
300 packets per second and 10 seconds, respectively.
UDP packets from the Internet exceeds the user-defined
threshold value, the router will be forced to randomly discard
the subsequent UDP packets within the user-defined timeout
period. The default setting for threshold and timeout are 300
packets per second and 10 seconds, respectively.
Activates the ICMP flood defense function. If the amount of
ICMP echo requests from the Internet exceeds the
user-defined threshold value, the router will discard the
subsequent echo requests within the user-defined timeout
period. The default setting for threshold and timeout are 300
packets per second and 10 seconds, respectively.
packets with different port numbers to find available services,
which respond. The router will identify it and report a warning
message if the port scanning rate in packets per second exceeds
the user-defined threshold value. The default threshold is 300
pps (packets per second).
Vigor3300 Series User's Guide