SNMP on Windows and CentOS 7
Simple Network Management Protocol (SNMP) is a internet standard protocol, that allows us to read and write information from a device.
In this case we will only use the reading feature to monitor the devices.
SNMP on Windows and Linux operating systems is not by default installed and active, on active network equipment depends on the manufacturer.
SNMP on Windows
Activate SNMP in a Windows server (2012) go to Server Manager click on Manage -> Add Roles and Features
Click next until Features menu and add SNMP Service.
When the installation is finished go to Services and find SNMP Service and go to Properties and switch to Security Tab.
And finally add the IP of yours Zabbix Server.
SNMP on CentOS 7
Install snmp Packages on centos 7
yum install net-snmp net-snmp-utils -y