"cluster" match support

modulename: xt_cluster.ko


Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>Network packet filtering framework (Netfilter)
└─>Core Netfilter Configuration
└─>"cluster" match support
In linux kernel since version 2.6.30 (release Date: 2009-06-09)  
This option allows you to build work-load-sharing clusters of
network servers/stateful firewalls without having a dedicated
load-balancing router/server/switch. Basically, this match returns
true when the packet must be handled by this cluster node. Thus,
all nodes see all packets and this match decides which node handles
what packets. The work-load sharing algorithm is based on source
address hashing.

If you say Y or M here, try `iptables -m cluster --help` for
more information.

source code: