We need open the ipv4 forwarding on the host
sysctl -w net.ipv4.ip_forward = 1
Add follow lines into /etc/rc.locat
to set NAT tableiptables -Fiptables -P INPUT ACCEPTiptables -P FORWARD ACCEPTiptables -t nat -A POSTROUTING -o [Sharing interface name] -j MASQUERADE
Reboot the host device to enable the settings.Set the host device IP (如果是多网卡方式组建局域网,需将网关设置为连接外网的网卡的IP, 内网网卡仅仅作AP点用)as gateway on the associate deviceGoogle DNS server can be use Google free DNS 8.8.8.8 | 8.8.4.4 or OpenDNS 208.67.222.222 | 208.67.220.220