"ah" match support

modulename: ipt_ah.ko

configname: CONFIG_IP_NF_MATCH_AH

Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>Network packet filtering framework (Netfilter)
└─>IP: Netfilter Configuration
└─>"ah" match support
In linux kernel since version 2.6.17 (release Date: 2006-06-17)  
This match extension allows you to match a range of SPIs
inside AH header of IPSec packets.

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

source code: