Spectracom SecureSync User Manual

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:
Disable Enable Stratum 1 Operation.
Disable Enable Stratum 1 1PPS.
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107.
9.
Wait for NTP to synchronize to the NTP References provided.
2.14.9.2 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:
To CREATE a Symmetric Key, click the PLUS icon in the top-right corner, and pro-
ceed to Step4.
2.14 Configuring NTP
CHAPTER 2 • SecureSync User Reference Guide Rev. 26
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Spectracom SecureSync Specifications

General

Model	SecureSync
Time Reference	GPS, GLONASS, BeiDou, Galileo, IRIG, NTP, PTP, 1PPS
Disciplines	GNSS, IRIG, PTP, NTP, SyncE
Inputs	GPS, GLONASS, BeiDou, Galileo, IRIG, NTP, PTP, 1PPS
Outputs	NTP, PTP, 1PPS, IRIG
Protocols	PTP, NTP, SNMP, SSH, HTTPS
Form Factor	1U Rack-mount
Redundancy	Optional redundant power supply
Security Features	Password protection, access control lists, SSH, HTTPS, SNMPv3, NTP authentication, PTP authentication
Power Supply	100-240 VAC, 50-60 Hz
Operating Temperature	0°C to +50°C
Dimensions	44.45 mm (H) x 482.6 mm (W)