nnfc is the New Netflow Collector. nnfc is aimed to be POSIX-
compliant, portable collector of flows, generated by Cisco and other
routers. It understands v1, v5 and v7 flows now. Support for v8 and v9
netflow will be added soon. All flows, collected by nnfc, may be stored
in databases or other places, using module interface of nnfc.