Cisco 4215 - Intrusion Detection Sys Sensor Configuration Manual page 504

Glossary
N
Native Address Translation. A network device can present an IP address to the outside networks that is
NAT
different from the actual IP address of a host.
A component of the IPS. A software module that provides block and unblock functionality where
Network Access
applicable.
Controller
Hosts and networks you have identified that should never be blocked.
never block address
See never block address.
never shun address
A device that controls IP traffic on a network and can block an attacking host. An example of a network
network device
device is a Cisco router or PIX Firewall.
Network Interface Card. Board that provides network communication capabilities to and from a
NIC
computer system.
A network module that integrates IPS functionality into the branch office router.
NM-CIDS
network management system. System responsible for managing at least part of a network. An NMS is
NMS
generally a reasonably powerful and well-equipped computer, such as an engineering workstation.
NMSs communicate with agents to help keep track of network statistics and resources.
A physical communicating element on the command and control network. For example, an appliance,
node
an IDSM-2, or a router.
Configures how the IP and TCP normalizer functions and provides configuration for signature events
NORMALIZER
engine related to the IP and TCP normalizer.
Network Security Database. A database of security information that explains the signatures the IPS
NSDB
uses along with the vulnerabilities on which these signatures are based. The NSDB contains a
description for each attack signature that the sensor can detect.
Network Timing Protocol. Protocol built on top of TCP that ensures accurate local time-keeping with
NTP
reference to radio and atomic clocks located on the Internet. This protocol is capable of synchronizing
distributed clocks within milliseconds over long time periods.
Network Timing Protocol server. A server that uses NTP. NTP is a protocol built on top of TCP that
NTP server
ensures accurate local time-keeping with reference to radio and atomic clocks located on the Internet.
This protocol is capable of synchronizing distributed clocks within milliseconds over long time
periods.
Non-Volatile Read/Write Memory. RAM that retains its contents when a unit is powered off.
NVRAM
O
online insertion and removal. Feature that permits you to add, replace, or remove cards without
OIR
interrupting the system power, entering console commands, or causing other software or interfaces to
shutdown.
Cisco Intrusion Prevention System Sensor CLI Configuration Guide for IPS 5.0
GL-10
78-16527-01