"string" match support

modulename: xt_string.ko

configname: CONFIG_NETFILTER_XT_MATCH_STRING

Linux Kernel Configuration
└─>Networking
└─>Networking options
└─>Network packet filtering (replaces ipchains)
└─>Core Netfilter Configuration
└─>"string" match support
In linux kernel since version 2.6.16 (release Date: 2006-03-19)  
This option adds a `string' match, which allows you to look for
pattern matchings in packets.

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

source code: