Cisco Systems IPS4510K9 Configuring Time

3-35
Cisco Intrusion Prevention System Sensor CLI Configuration Guide for IPS 7.2
OL-29168-01
Chapter3 Setting Up the Sensor
Configuring Time
Step 5 Check your new setting. The account of the user jsmith is now unlocked as indicated by the lack of
parenthesis.
sensor# show users all
CLI ID User Privilege
* 1349 cisco administrator
5824 jsmith viewer
9802 tester operator
For More Information
For the procedure for locking the user accounts, see Locking User Accounts, page3-33 .
Configuring Time
This section describes the importance of having a reliable time sour ce for the sensor. It contains the
following topics:
• Time Sources and the Sensor, page 3-35
• Synchronizing IPS Module System Clocks with the Parent Device System Clock, page 3-36
• Correcting Time on the Sensor, page 3-36
• Configuring Time on the Sensor, page3-36
• Configuring NTP, page 3-42
Time Sources and the Sensor
Note We recommend that you use an NTP server to regulate time on your sensor. You can use authenticated
or unauthenticated NTP. For 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.
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. This section provides a summary of the various ways
to set the time on sensors.
The IPS Standalone Appliances
• Use the clock set command to set the time. This is the default.
• Configure the appliance to get its time from an NTP time synchronization source.
Note The currently supported Cisco IPS appliances are the IPS 4345, IPS 4360, IPS 4510, and
IPS 4520.