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SNMP
246
BLACK BOX
®
Advanced Console Server
SNMP
Short for Simple Network Management Protocol: a set of protocols for managing complex
networks. The first versions of SNMP were developed in the early 80s. SNMP works by send-
ing messages, called protocol data units (PDUs), to different parts of a network. SNMP-com-
pliant devices, called agents, store data about themselves in Management Information Bases
(
MIB
s) and return this data to the SNMP requesters.
The BLACK BOX
®
Advanced Console Server uses the net-snmp package (http://www.net-
snmp.org).
The net-snmp supports snmp version 1, 2 and 3. To use SNMP version 3 (username/pass-
word), perform the following steps:
Step 1: Create a file /etc/snmp/snmpd.local.conf with the following line:
createUser <username> MD5 <password> DES
Step 2: Include the following line in /etc/snmp/snmpd.conf, if the user has permission to
read only:
rouser <username>
Step 3: Include the following line in /etc/config_files:
/etc/snmp/snmpd.local.conf
Important!
Check the SNMP configuration before gathering information about
BLACK BOX
®
Advanced Console Server by SNMP. There are different types of
attacks an unauthorized user can implement to retrieve sensitive information
contained in the MIB. By default, the SNMP configuration in BLACK BOX
®
Advanced Console Server cannot permit the public community to read SNMP
information.