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Introduction This tutorial is a HowTo for setting up IPv6 NAT on an OpenWRT router. The information on the environment is listed below. Network Environment: China Education and Research Network Center with dual-stack IPv6 Network Device: NETGEAR R6100 (128M RAM) Firmware Version: OpenWrt Chaos Calmer 15.05 Install Dependencies for OpenWRT Login to the OpenWRT router via SSH and run the following commands: Setup IPv6 for Local-area Network Edit /etc/config/network, and add the following lines in config interface 'lan': Remove the following lines if exists: Edit /etc/config/dhcp, and change the content in  config dhcp 'lan' as follows: Setup Gateway for IPv6 Network Add the following lines to /etc/firewall.user for forwarding IPv6 traffic: Setup up IPv6 gateway by creating a file in /etc/hotplug.d/iface/90-ipv6 and adding the following lines to…