Ntp: Symmetric Keys (Md5) - Spectracom SecureSync 1200 User Reference Manual

2.15 Configuring NTP
7.
For all NTP Stratum-2 servers and higher stratum numbers, under the Stratum-1 tab in the
Edit NTP Services window configure the NTP Stratum-1 references:
8.
In the NTP Servers panel of the main window, add an NTP server and enable the
Autokey option box. See "NTP Servers: Adding, Configuring, Removing" on page 102.
9.
Wait for NTP to synchronize to the NTP References provided.

2.15.9.2 NTP: Symmetric Keys (MD5)

Symmetric Keys are an encryption means that can be used with NTP for authentication pur
poses.
SecureSync supports authenticated NTP packets using an MD5 authenticator. This feature does
not encrypt the time packets, but attaches an authenticator, which consists of a key identifier
and an MD5 message digest, to the end of each packet. This can be used to guarantee that
NTP packets came from a valid NTP client or server, and that they were not tampered with dur
ing transmission. The Symmetric Keys tab allows NTP to be configured to use MD5 authen
tication.
Configuring NTP Symmetric Keys
To create, edit, or delete Symmetric Keys (MD5 Authentication):
1.
Navigate to MANAGEMENT > NETWORK: NTP Setup .
2.
In the Actions panel, click the Symmetric Keys button:
3.
The NTP Symmetric Keys window will display:
112
Disable Enable Stratum 1 Operation.
Disable Enable Stratum 1 1PPS.
To CREATE a Symmetric Key , click the PLUS icon in the top-right corner, and pro
ceed to Step 4.
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