CentOS 5 uses the net-snmp package.

I am used to the similar but different snmpd package.

They appear to have different conventions about what can be used as a "community string".
And when net-snmp sees a community string it doesn't like, it just fails silently without
giving an error message.

I have not been able to find what net-snmp considers a valid community string.

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Drew Einhorn