Cisco 4215 - Intrusion Detection Sys Sensor Configuration Manual page 495

Numerals
Triple Data Encryption Standard. A stronger version of DES, which is the default encryption method
3DES
for SSH version 1.5. Used when establishing an SSH session with the sensor. It can be used when the
sensor is managing a device.
A
authentication, authorization, and accounting. The primary and recommended method for access
aaa
control in Cisco devices.
authentication, authorization, and accounting. Pronounced "triple a."
AAA
Access Control Entry. An entry in the ACL that describes what action should be taken for a specified
ACE
address or protocol. The sensor adds/removes ACE to block hosts.
acknowledgement. Notification sent from one network device to another to acknowledge that some
ACK
event occurred (for example, the receipt of a message).
Access Control List. A list of ACEs that control the flow of data through a router. There are two ACLs
ACL
per router interface for inbound data and outbound data. Only one ACL per direction can be active at a
time. ACLs are identified by number or by name. ACLs can be standard, enhanced, or extended. You
can configure the sensor to manage ACLs.
The sensor's response to an event. An action only happens if the event is not filtered. Possible actions
action
include TCP reset, block host, block connection, IP logging, and capturing the alert trigger packet.
The ACL created and maintained by Network Access Controller and applied to the router block
active ACL
interfaces.
Application Inspection and Control engine. Provides deep analysis of web traffic. It provides granular
AIC engine
control over HTTP sessions to prevent abuse of the HTTP protocol. It allows administrative control
over applications that try to tunnel over specified ports, such as instant messaging, and tunneling
applications, such as gotomypc. It can also inspect FTP traffic and control the commands being issued.
The IPS software module that processes all signature events generated by the inspectors. Its primary
Alarm Channel
function is to generate alerts for each event it receives.
Specifically, an IPS event type; it is written to the Event Store as an evidsAlert. In general, an alert is
alert
an IPS message that indicates a network exploit in progress or a potential security problem occurrence.
Also known as an alarm.
78-16527-01
G L O S S A R Y
Cisco Intrusion Prevention System Sensor CLI Configuration Guide for IPS 5.0
GL-1