Monitor your Network with SNMP v3

Monitoring IT infrastructure is very essential function for any successful business or organization to run at the best performance and offer quality services to their customers and users.

SNMP which stands for Simple Network Management Protocol, is a communication protocol that allows you to monitor managed network devices to include routers, switches ,servers and many other IP enabled devices through a single management system.

There are several components that comprises the SNMP monitoring framework can be listed as follows:

1. SNMP Manager Device
2. SNMP agents / Managed Devices
3. Traps: What used when the managed devices needs to alert the SNMP manager system with trap events.

Lets assume that our SNMP Manager has the IP of 192.168.1.20 and the SNMP Agents are in the range of 192.168.1.30–40.

Basic SNMP Communication Diagram

SNMP Setup

1. SNMP Manager — Linux OS

Install the SNMP Software

yum install net-snmp net-snmp-utils -y

Update CentOS firewalld to receive information over port 162

firewall-cmd --permanent --add-port=162/udp
firewall-cmd --reload
firewall-cmd --list-all