====== Net-snmp ======

**General Information**

How to install the net-snmp service for monitoring.

**Checklist**
  * Distro(s): Enterprise Linux

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===== Install and Configure net-snmp =====

  * Install net snmp<code bash>yum install net-snmp-utils net-snmp</code>

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  * Create the SNMPv3 User<code bash>net-snmp-create-v3-user -ro -A <Authpw> -X <Encryptionpw> -a SHA -x AES <snmpv3username></code>
    * Example:<code bash>net-snmp-create-v3-user -ro -A MyAuthPW123 -X MyEncryptPW123 -a SHA -x AES systempoller</code>

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  * Comment out default user and group<code bash>sed -i 's/^com2sec notConfigUser/#com2sec notConfigUser/' /etc/snmp/snmpd.conf
sed -i 's/^group   notConfigGroup/#group   notConfigGroup/' /etc/snmp/snmpd.conf</code>

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  * Start the snmpd service
    * EL7<code bash>systemctl start snmpd</code>
    * EL6<code bash>service snmpd start</code>

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  * Configure service to start at boot
    * EL7<code bash>systemctl enable snmpd</code>
    * EL6<code bash>chkconfig snmpd on</code>

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  * Test the user<code bash>snmpwalk -u <snmpv3username> -A <Authpassword> -a SHA -X <Encryptionpassword> -x AES -l authPriv -v3 127.0.0.1 | head</code>

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===== SNMP Config File =====

Location: /etc/snmp/snmpd.conf

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Configure SNMP System Information
<code bash>
syslocation Datacenter, Row 3, Rack 2
syscontact UNIX Admin <admin@example.com>
</code>

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