Net-SNMP version 3 and OpenNMS

To monitor your systems you rely heavily on SNMP, it gives out of the box a lot of possibilities getting important performance and status information.

The main topic security is often not considered. SNMP version 1 and 2c transmit everything in plain text over the wire. There is also no user, password authentication method, just a shared community string which gives access to the information. To address these problems SNMP v3 was introduced.