PPTP VPN on Ubuntu 12.04 Example

instruction.txt

Here is a quick tutorial to set up a basic PPTP VPN server on Ubuntu 12.04.

Install Necessary Packages
  $ aptitude install ppp pptpd
  
Configure DNS Servers to Use When Clients Connect to this PPTP Server
  $ nano /etc/ppp/pptpd-options

Modify OR Add the following lines in end
  ms-dns 8.8.8.8
  ms-dns 8.8.4.4

Create a PPTP User
  $ nano /etc/ppp/chap-secrets

Append a line at the bottom so your file looks something like:
  # client    server  secret          IP addresses
  test        pptpd   abcd1234        *

Configure NAT for PPTP Connections

Without this step you will be able to connect but your connection will not be able to load any web connection from this server.
  $ nano /etc/rc.local

Add the following to the bottom right before “exit 0” line:
  iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE

Assuming eth0, you can use ifconfig to check network name.

Enable IPv4 forwading:
  $ nano /etc/sysctl.conf

Uncomment the following line:
  net.ipv4.ip_forward=1

Then reload the configuration:
  $ sysctl -p
  
Restart your pptpd server
  $ service pptpd restart