ipt-netflow is high performance NetFlow exporting module for Linux kernel (up to 3.16). Designed for Linux router with heavy network load. This is netfilter/iptables module adding support for -j NETFLOW target. Designed to work efficiently w/o conntrack.
ipt-netflow version 2.0 has been released. This is major release with a lot of new features and improvements, such as: Support of NetFlow protocols v9 and IPFIX. Accounting for IPv6 traffic, NAT translation events (NEL). Additional options is SNMP-index translation rules, Ethernet Type, VLAN, and MAC addresses exporting. Performance improvements (tested to work well on 10Gbit load). Stability improvements and bug fixes.
SourceForge.net Project Page:
http://sourceforge.net/projects/ipt-netflow/
GutHub Project Page:
https://github.com/aabc/ipt-netflow