1. Install pptp client $ sudo pacman -S pptpclient

2. Add new vpn connection: $ pptpsetup --create my_tunnel --server vpn.example.com --username alice --password foo --encrypt

3. Route All Traffic by /etc/ppp/ip-up.d: Create a file called 01-routes.sh under /etc/ppp/ip-up.d

4. Append this lines to the newly created file:

#!/bin/bash

# This script is called with the following arguments:
# Arg Name
# $1 Interface name
# $2 The tty
# $3 The link speed
# $4 Local IP number
# $5 Peer IP number
# $6 Optional ``ipparam'' value foo

ip route add default via $4

5. Make the file executeable: sudo chmod 755 01-routes.sh

6. Connect: $ pon my_tunnel

7. Disconnect: $ poff my_tunnel

8. If you need to delete your delete your vpn connection: $ pptpsetup --delete my_tunnel