Security
HMG-838PT & HMG-838EPT Web Configuration 5-10
SNMPv3 Community Configuration:
Delete: Check to delete the entry. It will be deleted during the next save.
Community: Indicates the community access string to permit access to SNMPv3 agent. The allowed string length
is 1 to 32, and the allowed content is ASCII characters from 0x21 to 0x7E. The community string will be treated as
security name and map a SNMPv1 or SNMPv2c community string. This string is case sensitive.
Source IP: Indicates the SNMP access source address. A particular range of source addresses can be used to
restrict source subnet when combined with source mask.
Source Mask: Indicates the SNMP access source address mask.
5-1.7.4 SNMPv3 User Configuration
Configure SNMPv3 user table on this page. The entry index keys are Engine ID and User Name.
SNMPv3 User Configuration:
Engine ID: An octet string identifying the engine ID that this entry should belong to. The string must contain an
even number (in hexadecimal format) with number of digits between 10 and 64, but all-zeros and all-'F's are not
allowed. The SNMPv3 architecture uses the User-based Security Model (USM) for message security and the
View-based Access Control Model (VACM) for access control. For the USM entry, the usmUserEngineID and
usmUserName are the entry's keys. In a simple agent, usmUserEngineID is always that agent's own
snmpEngineID value. The value can also take the value of the snmpEngineID of a remote SNMP engine with
which this user can communicate. In other words, if user engine ID equal system engine ID then it is local user;
otherwise it is a remote user.
User Name: A string identifying the user name that this entry should belong to. The allowed string length is 1 to 32,
and the allowed content is ASCII characters from 0x21 to 0x7E.
Security Level: Indicates the security model that this entry should belong to. Possible security models are:
NoAuth, NoPriv: No authentication and no privacy.
Auth, NoPriv: Authentication and no privacy.
Auth, Priv: Authentication and privacy.
The value of security level cannot be modified if entry already exists. That means it must first be ensured that the value
is set correctly.
Authentication Protocol: Indicates the authentication protocol that this entry should belong to. Possible
authentication protocols are:
None: No authentication protocol.
MD5: An optional flag to indicate that this user uses MD5 authentication protocol.
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