Hello Jules!
The first thing we should do is check if there are other events from Fortigate that are reaching the manager.
Keep in mind that to generate alerts, the logs have to reach the manager and then these logs have to be decoded and trigger any of the available rules.
To know if these logs are reaching the manager, please enable the
logall-json setting in the manager ossec.conf file, and then restart the manager.
<global>
...
<logall>yes</logall>
<logall_json>yes</logall_json>
...
</global>After that, please verify that the expected logs are coming to the manager checking the
/var/ossec/logs/archives/archives.json.
If there are other events related to Fortigate you need to check if they are being decoded properly and triggering rules or not. You can do it using the
wazuh-logtest feature in Wazuh manager. You will find more information about this
here.
Let me know if you need any help with these steps.
Regards!