This product cannot stand any service provider production network I can
think of. It is toooooo slow to handle high-speed routers. I suggest
staying away from all ManageEngine's products in general, but NFA is the
worst of them.
That doesn't mean that their description of the internal error fits
what happened. Not to say that there were an attack, just that there
can be more internal failures, including processes, to be accounted
for. Whether they will publish a root-cause analysis/swiss chesse
model/<insert your preferred methodology> or not is up to them, but to
tech-savvy stakeholders I think they are still in debt.