Defining Sntp Authentication - Cisco 300 Series Administration Manual

Administration: Time Settings
Configuring System Time
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Cisco Small Business 200, 300 and 500 Series Managed Switch Administration Guide (Internal Version)
Select an interface and select the reception/transmission options.
Click Apply to save the settings to the Running Configuration file.

Defining SNTP Authentication

SNTP clients can authenticate responses by using HMAC-MD5. An SNTP server is
associated with a key, which is used as input together with the response itself to
the MD5 function; the result of the MD5 is also included in the response packet.
The SNTP Authentication page enables configuration of the authentication keys
that are used when communicating with an SNTP server that requires
authentication.
The authentication key is created on the SNTP server in a separate process that
depends on the type of SNTP server you are using. Consult with the SNTP server
system administrator for more information.
Workflow
Enable authentication in the SNTP Authentication page.
Create a key in the SNTP Authentication page.
Associate this key with an SNTP server in the SNTP Unicast page.
To enable SNTP authentication and define keys:
Click Administration > Time Settings > SNTP Authentication.
Select SNTP Authentication to support authentication of an SNTP session
between the device and an SNTP server.
Click Apply to update the device.
Click Add.
Enter the following parameters:
• Authentication Key ID—Enter the number used to identify this SNTP
authentication key internally.
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