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user-defined timeout period.
timeout are 300 packets per second and 10 seconds, respectively.
Enable ICMP flood defense
Click the checkbox to activate the ICMP flood defense function. Similar
to the UDP flood defense function, the router will discard the ICMP echo
requests coming from the Internet, once they exceed the user-defined
threshold (by default, 300 packets per second) in a period of time (by
default, 10 second for timeout).
Enable PortScan detection
Port scan attacks occur by sending packets with different port numbers in
an attempt to scanning the available services that one port will respond.
To examine such exploration behavior, please click the checkbox to
activate the Port Scan detection function in your Vigor router. The Vigor
router will identify it and report a warning message if the port-scanning
rate in packets per second exceeds the user-defined threshold value.
By default, the Vigor router sets the threshold as 300 packets per second
to detect such a scanning activity.
Block IP options
Click it to activate the Block IP options function. The Vigor router will
ignore any IP packets with IP option field appeared in the datagram
header. The IP option provides a way for hosts to send some significant
information, such as security, compartmentation, TCC (closed user
group)
parameters,
messages...etc., which an outsider can analyze to learn details about
your private networks.
Firewall Setup
The default setting for threshold and
a
series
of
Internet
6-15
addresses,
routing
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