"TEE" - packet cloning to alternate destination

modulename: xt_TEE.ko

configname: CONFIG_NETFILTER_XT_TARGET_TEE

Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>Network packet filtering framework (Netfilter)
└─>Core Netfilter Configuration
└─>The IPv6 protocol
└─>The IPv6 protocol
└─>"TEE" - packet cloning to alternate destination
In linux kernel since version 2.6.35 (release Date: 2010-08-01)  
This option adds a "TEE" target with which a packet can be cloned and
this clone be rerouted to another nexthop.

source code: