Time Sources And The Sensor; The Sensor And Time Sources - Cisco IPS-4255-K9 - Intrusion Protection Sys 4255 Installation Manual

Time Sources and the Sensor

The NME IPS installs in any slot in the 2800 and 3800 series access routers.
NME IPS.
Figure 1-10
For More Information
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Time Sources and the Sensor
This section explains the importance of having a reliable time source for the sensors and how to correct
the time if there is an error. It contains the following topics:
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The Sensor and Time Sources

The sensor requires a reliable time source. All events (alerts) must have the correct UTC and local time
stamp, otherwise, you cannot correctly analyze the logs after an attack. When you initialize the sensor,
you set up the time zones and summertime settings.
We recommend that you use an NTP server. You can use authenticated or unauthenticated NTP. For
Note
authenticated NTP, you must obtain the NTP server IP address, NTP server key ID, and the key value
from the NTP server. You can set up NTP during initialization or you can configure NTP through the
CLI, IDM, IME, or ASDM.
Cisco Intrusion Prevention System Appliance and Module Installation Guide for IPS 7.0
1-26
NME IPS
N M -C IP
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M O D U L
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L IN K
D U P L E X
For a list of supported router and NME IPS combinations, see
Requirements, page 8-2.
For information on installing the NME IPS, see
For more information about sessioning to the NME IPS, see
For more information on configuring the NME IPS, refer to
The Sensor and Time Sources, page 1-26
Synchronizing IPS Module System Clocks with the Parent Device System Clock, page 1-28
Verifying the Sensor is Synchronized with the NTP Server, page 1-28
Correcting the Time on the Sensor, page 1-29
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Installation and Removal Instructions, page
Chapter 1 Introducing the Sensor
Figure 1-10 shows the
Software and Hardware
Logging In to the NME IPS, page
Configuring the NME IPS.
8-5.
9-9.
OL-18504-01