Hi Brett,

here you can find information about the configuration 
preference: 
https://documentation.wazuh.com/current/user-manual/reference/centralized-configuration.html#precedence

In your case, both configurations are applying. Also, I recommend you to 
filter other noisy events 
<https://github.com/wazuh/wazuh/blob/master/src/win32/ossec.conf#L17>.

Regards.

On Thursday, April 20, 2017 at 6:26:18 PM UTC+2, Brett Simpson wrote:
>
> I wasn't sure how to do this or if it's possible but I have a large number 
> of ossec agents where I want to filter out specific Windows Event ID agent 
> side. If I modify the ossec.conf on the agent and replace the log_format of 
> my System from eventlog  to eventchannel it works however if I leave it to 
> eventlog and alter the centralized agent config to include that for Windows 
> OS it doesn't work. I do see it get replicated to the agent under the 
> shared folder but it looks like eventlog is taking priority. Touching each 
> agent is not feasible as I just don't have that kind of control, at least I 
> would have to somehow repackage an ossec install and wrap a new config into 
> it, then have my IT people reinstall it on hundreds of Windows systems. 
> Although I'm testing filtering event ID 7000 on a workstation I have many 
> Windows servers with the windows packet filtering bombarding the event 
> logs. This ends up saturating my network links from the agent to the 
> manager which I want to eliminate.
>
> In ossec.conf
>   <localfile>
>     <location>System</location>
>     <log_format>eventlog</log_format>
>   </localfile>
>
> In Shared folder as agent.conf
> <agent_config os="Windows">
>
>   <localfile>
>     <location>System</location>
>     <log_format>eventchannel</log_format>
>     <query>Event/System[EventID!=7000]</query>
>   </localfile>
>
> </agent_config>
>

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