Setup Enable PPTP VPN @ uBuntu 12.04 LTS


1. apt-get install pptpd   (Install it)
   service pptpd stop      (Stop it)
   

2. vi /etc/pptpd.conf  (Just Uncomment them, the "Recommended")
   => localip 192.168.0.1
   => remoteip 192.168.0.234-238,192.168.0.245

3. vi /etc/ppp/chap-secrets
   => <username> pptpd <password> *

   e.g.  jack pptpd  jack1234  *
         rose pptpd  rose5566  *

4. vi /etc/ppp/options (Change DNS for VPN Users)
   => ms-dns 8.8.8.8
   => ms-dns 168.95.1.1

5. vi /etc/sysctl.conf  (Enable Packet Forwarding)
   => net.ipv4.ip_forward=1

6. sysctl -p              (Reload Sysctl.conf)

7. service pptpd start    (or Restart it)

8. /sbin/iptables -t nat -A POSTROUTING -s 192.168.0.0/24 -o eth0 -j MASQUERADE