Details
Sets the key used to authenticate NTP servers
Rationale:
When authentication is not enabled, attackers can disguise as NTP servers and broadcast wrong time and it will be difficult to correlate events upon an incident. In some other cases, attackers can perform NTP DDoS attacks such as NTP Amplification.
Solution
* Step 1: Run the following to set the authentication key ID
HOSTNAME(CONFIG)# NTP TRUSTED-KEY _
* Step 2: Run the following to configure the authentication key
HOSTNAME(CONFIG)# NTP AUTHENTICATION-KEY _
Supportive Information
The following resource is also helpful.
This security hardening control applies to the following category of controls within NIST 800-53: Identification and Authentication.This control applies to the following type of system Cisco.