Cisco IPS 7.1 Installation Guide download pdf (Page 38)

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Cisco Intrusion Prevention System Appliance Hardware Installation Guide for IPS 7.1

OL-24002-01

Chapter 1 Introducing the Sensor

Time Sources and the Sensor

Connecting an Appliance to a Terminal Server

A terminal server is a router with multiple, low speed, asynchronous ports that are connected to other

serial devices. You can use terminal servers to remotely manage network equipment, including

appliances.

To set up a Cisco terminal server with RJ-45 or hydra cable assembly connections, follow these steps:

Step 1 Connect to a terminal server using one of the following methods:

• For terminal servers with RJ-45 connections, connect a rollover cable from the console port on the

appliance to a port on the terminal server.

• For hydra cable assemblies, connect a straight-through patch cable from the console port on the

appliance to a port on the terminal server.

Step 2 Configure the line and port on the terminal server. In enable mode, enter the following configuration,

where # is the line number of the port to be configured.

config t

line #

transport input all

stopbits 1

flowcontrol hardware

speed 9600

exit

wr mem

Step 3 Be sure to properly close a terminal session to avoid unauthorized access to the appliance. If a terminal

session is not stopped properly, that is, if it does not receive an exit(0) signal from the application that

initiated the session, the terminal session can remain open. When terminal sessions are not stopped

properly, authentication is not performed on the next session that is opened on the serial port.

Caution Always exit your session and return to a login prompt before terminating the application used to establish

the connection.

Caution If a connection is dropped or terminated by accident, you should reestablish the connection and exit

normally to prevent unauthorized access to the appliance.

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:

• The Sensor and Time Sources, page 1-23

• Synchronizing IPS Module System Clocks with the Parent Device System Clock, page 1-23

• Verifying the Sensor is Synchronized with the NTP Server, page 1-23

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Cisco IPS 7.1 Installation Guide Page 38