HOWTO : VPN (PPTP) on BackTrack 5 R2

Step 1 :

apt-get update
apt-get dist-upgrade

apt-get install network-manager-gnome network-manager-pptp

Step 2 :

cp /etc/network/interfaces /etc/network/interfaces.bak

nano /etc/network/interfaces

Delete all entries but left the first two lines behind.

auto lo
iface lo inet loopback

Step 3 :

service network-manager start

Step 4 :

System >> Startup Applications >> Network Manager

Append "&" on the end of the Command. It will be looked like this :

nm-applet --sm-disable &

Make sure Start dhclient is enabled in the menu of Startup Applications.

Reboot the system and then configure your VPN (PPTP) as usual.

Make sure Advanced >> Use Point-to-Point encryption (MPPE) is enabled in the Configuration of PPTP.

That's all! See you.