NET-SNMP is delivered with a default SNMP configuration, which allows an easy setup and first usage.
As with every default configuration, it has to be adopted to the users company and security policies for productive usage.
Change the minimum configuration of the SNMP agent and the corresponding settings on the management platform in accordance with the guidelines of your security manual.
You should be particularly careful from a security point of view with the following configuration parameters:
Community strings for receiving SNMP requests (SNMP protocol version 1 and 2c)
Community strings and access control of MIB objects
Advanced security options for receiving SNMP requests (SNMPv3)
Community strings and sender addresses
Recipient’s addresses for SNMP traps