====== Simple Network Management Protocol - SNMP ======

This was tested on Ubuntu.

===== Prevent ipv6 operation =====

In /etc/snmp/snmpd.conf, ensure the listedn diretive does not include ipv6 addresses:-

<code>
#  Listen for connections on all interfaces (both IPv4 *and* IPv6)
#agentAddress udp:161,udp6:[::1]:161
agentAddress udp:161
</code>



===== Restrict logging to syslog =====

snmpd logs to the system logger service which as default logs informative messages to /var/log/syslog. This disguises many useful messages with snmpd noise. To correct this, you can add in /etc/snmp/snmpd.conf:-

<code>
dontLogTCPWrappersConnects true
</code>


http://raetsel.wordpress.com/2008/02/15/snmpd-filling-up-varlogmessages/

Alternate way of doing that: \\
Add below to the default SNMPD config to specify logging levels 0-4 ONLY : \\

<code>
root@fmc-enf-ncom-10:/var/log# cat /etc/default/snmpd | grep SNMPDOPTS=
SNMPDOPTS='-LS0-4d -Lf /dev/null -u snmp -g snmp -I -smux -p /var/run/snmpd.pid'
</code>