Chapter 1: Product description
System management
Page 1-54
If an SNTP server connection is available, the clock can be set to synchronize with the server
time at regular intervals. For secure applications, the PTP 670 can be configured to authenticate
received NTP messages using an MD5 signature.
Further reading
For information about…
Refer to…
How to plan for SNTP operation
on page
How to configure SNTP
SNMPv3 security
SNMP Engine ID
PTP 670 supports four different formats for SNMP Engine ID:
•
MAC address
•
IPv4 address
•
Configurable text string
•
IPv6 address
SNMPv3 security configuration is re-initialized when the SNMP Engine ID is changed.
User-based security model
PTP 670 supports the SNMPv3 user-based security model (USM) for up to 10 users, with MD5,
SHA-1, DES and (subject to the license key) AES protocols in the following combinations:
•
No authentication, no privacy,
•
MD5, no privacy,
•
SHA-1, no privacy,
•
MD5, DES,
•
SHA-1, DES,
•
MD5, AES,
•
SHA-1, AES.
Use of AES privacy requires the PTP 670 AES upgrade described in
View-based access control model
PTP 670 supports the SNMPv3 view-based access control model (VACM) with a single context.
The context name is the empty string. The context table is read-only, and cannot be modified
by users.
