"ipvs" match support

modulename: xt_ipvs.ko

configname: CONFIG_NETFILTER_XT_MATCH_IPVS

Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>Network packet filtering framework (Netfilter)
└─>Core Netfilter Configuration
└─>"ipvs" match support
In linux kernel since version 2.6.36 (release Date: 2010-10-20)  
This option allows you to match against IPVS properties of a packet.

If unsure, say N.

source code:
net/netfilter/xt_ipvs.c