Layer 3 Independent Connection tracking (EXPERIMENTAL)

modulename: nf_conntrack.ko

configname: CONFIG_NF_CONNTRACK

Linux Kernel Configuration
└─>Networking
└─>Networking options
└─>Network packet filtering (replaces ipchains)
└─>Core Netfilter Configuration
└─>Layer 3 Independent Connection tracking (EXPERIMENTAL)
In linux kernel since version 2.6.15 (release Date: 2006-01-02)  
Connection tracking keeps a record of what packets have passed
through your machine, in order to figure out how they are related
into connections.

Layer 3 independent connection tracking is experimental scheme
which generalize ip_conntrack to support other layer 3 protocols.

To compile it as a module, choose M here. If unsure, say N.

source code: