I'm currently running 8.2(1) on an ASA. This release supports NetFlow (via the flow-export commands). However, none of the NetFlow collectors I have tried seem to work (SolarWinds NetFlow, NTop, PRTG, Plixer Scrutinizer, ManageEngine NetFlow Analyzer).
Can anyone recommend a free NetFlow collector and reporting tool? I want to be able to report on the largest flows for a period (or for right now).