How to Install SNMP on CentOS

Needs reviewing

Install and Configure

yum -y install net-snmp net-snmp-utils
mv /etc/snmp/snmpd.conf /etc/snmp/snmpd.conf.orig
vim /etc/snmp/snmpd.conf

Config file:

# Map 'idv90we3rnov90wer' community to the 'ConfigUser'
# Map '209ijvfwer0df92jd' community to the 'AllUser'
# sec.name source community
com2sec ConfigUser default idv90we3rnov90wer
com2sec AllUser default 209ijvfwer0df92jd
# Map 'ConfigUser' to 'ConfigGroup' for SNMP Version 2c
# Map 'AllUser' to 'AllGroup' for SNMP Version 2c
# sec.model sec.name
group ConfigGroup v2c ConfigUser
group AllGroup v2c AllUser
# Define 'SystemView', which includes everything under .1.3.6.1.2.1.1 (or .1.3.6.1.2.1.25.1)
# Define 'AllView', which includes everything under .1
# incl/excl subtree
view SystemView included .1.3.6.1.2.1.1
view SystemView included .1.3.6.1.2.1.25.1.1
view AllView included .1
# Give 'ConfigGroup' read access to objects in the view 'SystemView'
# Give 'AllGroup' read access to objects in the view 'AllView'
# context model level prefix read write notify
access ConfigGroup "" any noauth exact SystemView none none
access AllGroup "" any noauth exact AllView none none

Restart Service

service snmpd restart

Ouput: Redirecting to /bin/systemctl restart snmpd.service
# This happens in CentOS 7

Enable

# chkconfig snmpd on

Output:
- Note: Forwarding request to ‘systemctl enable snmpd.service’. # This happens on CentOS 7
- Created symlink from /etc/systemd/system/multi-user.target.wants/snmpd.service to /usr/lib/systemd/system/snmpd.service.

Test the service

snmpwalk -v 2c -c idv90we3rnov90wer -O e 127.0.0.1

snmpwalk -v 2c -c 209ijvfwer0df92jd -O e 127.0.0.1

Test Remotely

snmpwalk -v 2c -c idv90we3rnov90wer -r