Ntp Access Restrictions - Spectracom PRISMA VelaSync User Manual

2.10 Configuring NTP
NOTES:
Duplicate key IDs are not permitted. NTP requests received by that do not contain an authen-
ticator containing a valid Key ID and MD5 message digest pair will be responded to, but no
authentication will be performed. An NTP request with valid authenticators results in a valid
NTP response with its own valid authenticator using the same Key ID provided in the NTP
request.
You may define the trusted Symmetric Keys that must be entered on both VelaSync, and any net-
work client with which VelaSync is to communicate. Only those keys for which the "Trusted" box
has been checked will appear in the dropdown menus on the NTP References screen.
2.10.10 N TP Access Restrictions
Next to encrypted authentication by means of Symmetric Keys, NTP supports a list-based means
of access restriction, the use of which is also recommended to prevent fraudulent or inadvertent
manipulation of a time server.
To configure NTP Access Restrictions:
1.
Navigate to MANAGEMENT > NETWORK: NTP Setup .
2.
In the Actions panel, click Access Restrictions :
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