IPv6 NAT

modulename: ip6table_nat.ko

and/or

nf_nat_ipv6.ko

configname: CONFIG_NF_NAT_IPV6

Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>Network packet filtering framework (Netfilter)
└─>The IPv6 protocol
└─>IPv6: Netfilter Configuration
└─>IPv6 NAT
In linux kernel since version 3.1 (release Date: 2011-10-24)  
The IPv6 NAT option allows masquerading, port forwarding and other
forms of full Network Address Port Translation. It is controlled by
the `nat' table in ip6tables, see the man page for ip6tables(8).

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

source code: