Configuring System Settings : Adding new NTP authentication keys
  
Adding new NTP authentication keys
1. Choose Administration > System Settings: Date and Time to display the Date and Time page.
2. Complete the configuration as described in this table.
Control
Description
Add a New NTP Authentication Key
Displays the controls to add an authentication key to the key list. Both trusted and untrusted keys appear on the list.
Key ID
Optionally, specify the secret MD5 or SHA1 key identifier for the NTP server. The valid range is from 1 to 65534.
Key Type
Select the authentication key type: MD5 or SHA1.
Secret
Specify the shared secret. You must configure the same shared secret for both the NTP server and the NTP client.
The MD5 shared secret:
is limited to 16 alphanumeric characters or fewer, or exactly 40 characters hexadecimal.
can’t include spaces or pound signs (#)
can’t be empty
is case sensitive
The SHA1 shared secret:
is limited to exactly 40 characters hexadecimal
can’t include spaces or pound signs (#)
can’t be empty
is case sensitive
The secret appears in the key list as its MD5 or SHA1 hash value.
Add
Adds the authentication key to the trusted keys list.
Remove Selected
Select the check box next to the name and click Remove Selected.
3. Click Save to Disk to save your settings permanently.