pptp-vpn-server-ubuntu14.04.sh

#! /bin/bash

#########
# os: ubuntu


install_pptp() { 
  sudo apt-get update
  sudo apt-get -y install pptpd
}

config_kernel_IP_forwarding() {
  sudo sed -i 's/#net.ipv4.ip_forward=1/net.ipv4.ip_forward=1/g' /etc/sysctl.conf
  sudo sysctl -p
}

config_pptp() {
  sudo sed -i 's/#localip 192.168.0.1/localip 192.168.0.1/g' /etc/pptpd.conf
  sudo sed -i 's/#remoteip 192.168.0.234-238,192.168.0.245/remoteip 192.168.0.234-238,192.168.0.245/g' /etc/pptpd.conf 
  sudo sed -i 's/#ms-dns 10.0.0.1/ms-dns 8.8.8.8/g' /etc/ppp/pptpd-options
  sudo sed -i 's/#ms-dns 10.0.0.2/ms-dns 8.8.4.4/g' /etc/ppp/pptpd-options
  sudo echo "$username  pptpd  \"$password\"  *" >> /etc/ppp/chap-secrets
}

iptables_config() {
  sudo apt-get -y install iptables
  sudo iptables -F
  sudo iptables -X
  sudo iptables -t nat -F
  sudo iptables -t nat -X
  sudo iptables -A INPUT -p gre -j ACCEPT
  sudo iptables -A INPUT -p tcp --dport 1723 -j ACCEPT 
  sudo iptables -A INPUT -p tcp --dport 47 -j ACCEPT 
  sudo iptables -t nat -A POSTROUTING -s 192.168.0.0/24 -o eth0 -j MASQUERADE
}


# start shell.
install_pptp

read -p "Please enter the VPN connection username:" username
read -p "Please enter the VPN connection password:" password

config_kernel_IP_forwarding
iptables_config
config_pptp
sudo service pptpd restart

echo -e "\npptp vpn service config success!!!"