Hi! Usually, when you see "not-applicable" in the application field in traffic logs it means that the firewall is actually denying traffic based on legacy attributes like source and destination IPs and ports and not the next-generation attributes like the application. This is totally normal, because remember rules are applied from left to right, so the firewall first matches the legacy attributes in order to try to filter as much traffic as it can using the least resources possible. If traffic matches source and destination IPs and ports (and zones), then the firewall starts matching the application and other harder-to-identify elements like the URL category. All of this is normal and it's done so the firewall doesn't waste resources trying to identify the application for a session that is going to be discarded (denied/dropped) anyways because it didn't pass the basic filtering (based on IPs and ports). So, unless you're having problems with legitimate traffic being dropped or denied way too early during processing and you're seeing "not-applicable" as a result of this, there nothing you should do, as your firewall is working as it should. Useful docs on this: Not-applicable in Traffic Logs Not-Applicable, Incomplete, Insufficient Data in the Application Field Hope this helps!
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