User manual

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SNMPv3 Access
SNMPv3 Access control users’ access to management information. Only a
user with access rights can manage the objects. When a user accesses the
management information, he can access only the objects defined by the
corresponding MIB view.
SNMPv3 USM-User
USM introduces the concepts of username and group. You can set the
authentication and privacy functions. The former is used to authenticate the
validity of the sending end of the authentication packets, preventing access of
illegal users; the latter is used to encrypt packets between the NMS and Agent,
preventing the packets from being intercepted. USM ensures a more secure
communication between SNMP NMS and SNMP Agent by authentication with
privacy, authentication without privacy, or no authentication no privacy