iptables-netflow-dkms - 2.6-7+b1 main

ipt-netflow is an iptables/netfilter target which generates traffic
statistics in NetFlow v5 and v9 format as well as in IPFIX format.
.
It provides high performance and scalability. For highest performance
module could be run without conntrack being enabled in
kernel. Reported to be able to handle 10Gbit traffic with more than
1500000 pps with negligible server load (on S5500BC).