Connection tracking timestamping

configname: CONFIG_NF_CONNTRACK_TIMESTAMP

Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>Network packet filtering framework (Netfilter)
└─>Core Netfilter Configuration
└─>Connection tracking timestamping
In linux kernel since version 2.6.39 (release Date: 2011-05-18)  
This option enables support for connection tracking timestamping.
This allows you to store the flow start-time and to obtain
the flow-stop time (once it has been destroyed) via Connection
tracking events.

If unsure, say `N'.