How to configure system time using NTP and also Authentication using NTP:
1 In the AMC, navigate to System Configuration > Services.
2 In the Network Services section, click the Configure link under NTP. The NTP Settings page displays.
3 To enable NTP, select the Enable NTP checkbox.
4 Under the NTP Servers, click on + icon.
5 In the Host field, enter the URL or IP address of NTP server which you want to synchronize your appliance.
6 Click Prefer this server checkbox to set the NTP server as preferred server and responses from this server will have high priority. In addition, selecting this option will unselect all other NTP servers and responses from the servers will have less priority. Only one host can be marked as preferred server.
7 Optionally, click Use NTP authentication checkbox if you want to configure authentication for each server. Authenticated NTP is a standard feature of NTP protocol that allows basic validation of the identity of an NTP server using a shared key. This option prevents the user from modifying the timestamps.
8 Click OK.
9 Click Save
NOTE: Contact your system administrator for the authentication ID and Key. In 12.4 only SHA1 hash algorithm is supported and MD5 is not supported.
NOTE: You can add up to four NTP servers by clicking on + icon.