#!/usr/bin/env bash

# install iproute net-tools
yum install -y iproute
yum install -y net-tools

# create tun device
ip tuntap add dev tun0 mode tun

# add ip addr for tun device
ip addr add 192.168.3.11/24 dev tun0

# kernel open ip forward
echo 1 > /proc/sys/net/ipv4/ip_forward

# start up tun0
ifconfig tun0 up