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Cisco SCE 8000 10GBE Software Configuration Guide
OL-30621-02
Chapter 12 Identifying and Preventing Distributed Denial-of-Service Attacks
Configuring Attack Detectors
In addition, an enabled attack detector may contain the following settings:
•
TCP-port-list/UDP-port-list—
Destination port list for the specified protocol. TCP and UDP
protocols may be configured for specified ports only. This is the list of specified destination ports
per protocol.
Up to 15 different TCP port numbers and 15 different UDP port numbers can be specified.
Configuring a TCP/UDP port list for a given attack detector affects only attack types that have the
same protocol (TCP/UDP) and are port-based (i.e. detect a specific destination port). Settings for
other attack types are not affected by the configured port list(s).
The following settings are configurable for each attack type in each attack detector. Each setting can
either be in a 'not configured' state (which is the default), or be configured with a specific value.
•
action—
Action:
–
report
(default)—Report beginning and end of the attack by writing to the attack-log.
–
block—
Block all further flows that are part of this attack, the Cisco SCE platform drops the
packets.
•
Thresholds
:
–
open-flows-rate—
Default threshold for rate of open flows. suspected-flows-rate—Default
threshold for rate of suspected DDoS flows.
–
suspected-flows-ratio—
Default threshold for ratio of suspected flow rate to open flow rate.
•
Use the appropriate keyword to enable or disable subscriber notification by default:
–
notify-subscriber—
Enable subscriber notification.
–
don't-notify-subscriber—
Disable subscriber notification.
•
Use the appropriate keyword to enable or disable sending an SNMP trap by default:
–
alarm—
Enable sending an SNMP trap.
–
no-alarm—
Disable sending an SNMP trap.
How to Enable a Specific Attack Detector and Assign it an ACL
From the SCE(config if)# prompt, type;
Command
Purpose
attack-detector
number
access-list (
aclnumber
|
none) [comment
comment
]
Enables the attack detector and assigns it the
specified ACL.