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ipt-netflow is high performance NetFlow exporting module for Linux kernel (up to 4.x). 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. Supporting NetFlow protocols v5, v9, and ... [More] IPFIX. Accounting for IPv4, IPv6 traffic, and NAT translation events (NEL). [Less]

An implementation of committed access rate, or simply rate limiting, or policing for Linux iptables, implemented with high performance in mind.