install vpn on ubuntu

install-vpn-on-ubuntu.sh

#!/bin/bash

default_user="vpn"
default_password="123456"

read -p "Input VPN username:(default is ${default_user})" user
read -p "Input VPN password:(default is ${default_password})" password

if [ $user=="" ];then
	user=$default_user
fi

if [ $password=="" ];then
	password=$default_password
fi

apt-get install pptpd

echo "localip 192.168.0.1" >> /etc/pptpd.conf
echo "remoteip 192.168.0.100-110" >> /etc/pptpd.conf

echo "ms-dns 8.8.8.8" >> /etc/ppp/pptpd-options
echo "ms-dns 8.8.4.4" >> /etc/ppp/pptpd-options

echo "${user} * ${password} *" >> /etc/ppp/chap-secrets

echo "net.ipv4.ip_forward=1" >> /etc/sysctl.conf
sysctl -p
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
/etc/init.d/pptpd restart