Summary

SNMP (Simple Network Management Protocol) is a protocol used for monitoring, managing, and configuring network devices such as routers, switches, servers, printers, and other devices connected to a network. It enables administrators to collect and organize information about network devices and make changes to their configurations remotely.

SNMP Versions

SNMPv1: The original version, basic but lacks strong security.
SNMPv2: Introduced performance improvements and new features but still limited in security.
SNMPv3: Enhanced version with robust security features like authentication and encryption.

General

To install on RHEL/CentOS

sudo yum install net-snmp net-snmp-utils

sudo systemctl enable snmpd

Replace /etc/snmp/snmpd.conf with:

rocommunity "{community_string}" {ip_of_snmp_collector}

sudo systemctl start snmpd

Info: Don't forget to allow snmp traffic thru your local firewall, too.