Draytek Vigor2760 Series User Manual page 108

UDP Flood
ICMP Flood
Port Scan
Apply
Clear
Cancel
3. After finished the settings above, click Apply to save the settings then click Cancel to
return to previous page.
the Internet has exceeded the defined value, the Vigor router
will start to randomly discard the subsequent TCP SYN
packets for a period defined in Timeout.
The goal for this is prevent the TCP SYN packets' attempt to
exhaust the limited-resource of Vigor router.
By default, the threshold and block time values are set to
2000 packets per second and 10 seconds, respectively.
Check the box to activate the UDP flood defense function.
Once detecting the Threshold of the UDP packets from the
Internet has exceeded the defined value, the Vigor router will
start to randomly discard the subsequent UDP packets for a
period defined in Timeout.
The default setting for threshold and block time values are
2000 packets per second and 10 seconds, respectively.
Check the box to activate the ICMP flood defense function.
Similar to the UDP flood defense function, once detecting the
Threshold of ICMP packets from Internet has exceeded the
defined value, the router will discard the ICMP echo requests
coming from the Internet.
The default setting for threshold and block time values are
250 packets per second and 10 seconds, respectively.
Port Scan attacks the Vigor router by sending lots of packets
to many ports in an attempt to find ignorant services would
respond.
Check the box to activate the Port Scan detection.
Whenever detecting this malicious exploration behavior by
monitoring the port-scanning Threshold rate, the Vigor router
will send out a warning.
By default, the Vigor router sets the threshold and block time
values are 2000 packets per second and 10 seconds,
respectively.
Click it to save the settings.
Click it to remove the modification of the web page.
Click it to return to previous web page.
100 Vigor2760 Series User's Guide