ipt-netflow is high performance NetFlow exporting module for Linux kernel. Designed for Linux router with heavy network load. This is netfilter/iptables module adding support for -j NETFLOW target.
ipt-netflow version 2.1 has been released. This is major release with a lot of new features and improvements, such as:
Options Templates support (V9 and IPFIX). Which let to implement: Flow Sampling (random, deterministic, and hash modes) for V9, IPFIX, and V5; Export Statistics (metering, exporting, sampling) and Configuration; Export Interface list (ifName, ifDescr). Promisc hack (no need to patch kernel anymore). SNMP monitoring interface and agent (via net-snmp dlmod). More compilation compatibility with recent kernels, grsecurity kernels, Gentoo, Debian, Centos. DKMS install support. And of course bug fixes and other improvements.
SourceForge.net Project Page:
http://sourceforge.net/projects/ipt-netflow/
GutHub Project Page:
https://github.com/aabc/ipt-netflow