Advice-- Receiver for OSSEC via Syslog

[rphung-cloudwave]

Greetings--
I've attempted to create a receiver for OSSEC messages from an ossec-control server by enabling a syslog forwarder:
from ossec.conf

<syslog_output>
    <server>localhost</server>
    <port>10514</port>
  </syslog_output>

Then on my agent config.yaml:

receivers:     
  syslog:
    udp:
      listen_address: "0.0.0.0:10514"
    protocol: rfc3164
    location: UTC
    attributes:
      chronicle_log_type: OSSEC

I get something like---
Failed to process entry","kind":"receiver","name":"syslog","data_type":"logs","operator_id":"syslog_input_internal_parser","operator_type":"syslog_parser","error":"parsed value was not rfc3164 or rfc5424 compliant"

Clearly, OSSEC isn't rfc-compliant.
I've tried something like:

udplog:
    listen_address: "localhost:10514"
    attributes:
      chronicle_log_type: OSSEC

and although it looks like it's listening, I'm not getting any events.
Any help is appreciated.