"connmark" connection mark match support

modulename: xt_connmark.ko

configname: CONFIG_NETFILTER_XT_MATCH_CONNMARK

Linux Kernel Configuration
└─>Networking
└─>Networking options
└─>Network packet filtering framework (Netfilter)
└─>Core Netfilter Configuration
└─>"connmark" connection mark match support
In linux kernel since version 2.6.16.30-pre1 (release Date: 2006-09-22)  
This option adds a `connmark' match, which allows you to match the
connection mark value previously set for the session by `CONNMARK'.

If you want to compile it as a module, say M here and read
Documentation/kbuild/modules.txt. The module will be called
ipt_connmark.ko. If unsure, say `N'.

source code: