Centos 6.8 snmp wont start on boot

[liwifexu]

Hi all,
So for the past 3 days I have been trying to get snmpd to auto start at boot time on an old centos machine.
I installed it and added the following line to the bottom of /etc/snmp/snmpd.conf

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rocommunity public

I then restarted the daemon

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service snmpd restart

Added the service to start at boot and confirmed by listing it

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chkconfig snmpd on

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chkconfig --list |grep snmpd

This shows that runlevel 2,3,4,5 are on
I then ran the snmpwalk test

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snmpwalk -c public -v2c <MY MACHINE IP ADDR>

This then gives me pages and pages of info
I know that snmp is working as I've also got another server which runs Zabbix 4.4 and this host is configured on it and is monitoring perfectly.
But I just cannot get the service to auto start??? It is killing.
Any ideas please? What other steps have I missed out here? I know I could try creating my own startup script but it already has all start and kill scripts in the rc.d dir.
Thanks for any help you can provide.

[TrevorH]

Are there any entries in the output from aureport -a with timestamps around the time of the last reboot? If so, take the number from the right hand end of each line in that output and feed it into ausearch -a nnnn and see if it helps.