IPv6 masquerade support

modulename: nf_nat_masquerade_ipv6.ko

configname: CONFIG_NF_NAT_MASQUERADE_IPV6

Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>Network packet filtering framework (Netfilter)
└─>The IPv6 protocol
└─>IPv6: Netfilter Configuration
└─>IPv6 masquerade support
In linux kernel since version 3.10 (release Date: 2013-06-30)  
This is the kernel functionality to provide NAT in the masquerade
flavour (automatic source address selection) for IPv6.

source code:
net/ipv6/netfilter/nf_nat_masquerade_ipv6.c