I've been using MikroTiks for years, but I'd be happy to be proven ignorant on this if there is such a feature. What I'm wanting is the ability in Winbox to specify an example packet details (ie. any option in a Firewall rule) and get a report of which rules--including NAT--would match that packet if it passed through the router. This would be a killer feature for tracking down security holes and just explaining why something isn't working when I think it should be.
So, is there anything like this available for RouterOS?