Table of Contents
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Chapter 10
Configuring the Sensor Using the CLI
Remember the NTP server's key ID and key values. You will need them along
Note
with the NTP server's IP address when you configure the sensor to use the NTP
server as its time source. See
Time Source, page
To set up a Cisco router to act as an NTP server, follow these steps:
Step 1
Log in to the router.
Enter configuration mode:
Step 2
router# configure terminal
Step 3
Create the key ID and key value:
router(config)# ntp authentication-key
The key ID can be a number between 1 and 65535. The key value is text (numeric
or character). It is later encrypted.
For example:
router(config)# ntp authentication-key 100 attack
Note
Note
Step 4
Designate the key you just created in Step 3 as the trusted key (or use an existing
key):
router(config)# ntp trusted-key
The trusted key ID is the same number as the key ID in Step 3. For example:
router(config)# ntp trusted-key 100
Step 5
Type the interface on the router that the sensor will communicate with:
Cisco Intrusion Detection System Appliance and Module Installation and Configuration Guide Version 4.1
78-15597-02
Configuring the Sensor to Use an NTP Server as its
10-21, for this procedure.
The sensor only supports MD5 keys.
Keys may already exist on the router. Use the show running
configuration command to check for other keys. You can use those values
for the trusted key in Step 4.
Sensor Initial Configuration Tasks
key-ID
key-value
md5
key-ID
10-23
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Table of Contents
Troubleshooting
