I am trying to setup a VPN connection on my machine, Ubuntu 12.04. The steps I did are the following:

sudo pptpsetup --create myvpn --server 123.123.123.123 --username vpnuser --encrypt

sudo pon myvpn

After entering my password, I am succesfully connected to the VPN I guess: the output of /var/log/syslog:

Jan 28 13:23:11 mypc pppd[4368]: CHAP authentication succeeded

Jan 28 13:23:11 mypc pppd[4368]: MPPE 128-bit stateless compression enabled

Jan 28 13:23:11 mypc pppd[4368]: local  IP address 172.20.x.x

Jan 28 13:23:11 mypc pppd[4368]: remote IP address 81.171.x.x

This is my ifconfig output:

ppp0      Link encap:Point-to-Point Protocol  

          inet addr:172.20.x.x  P-t-P:81.171.x.x  Mask:255.255.255.255

          UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1392  Metric:1

          RX packets:6 errors:0 dropped:0 overruns:0 frame:0

          TX packets:6 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:3 

          RX bytes:60 (60.0 B)  TX bytes:66 (66.0 B)



wlan0     Link encap:Ethernet  HWaddr 9c:4e:36:43:c8:8c  

          inet addr:192.168.x.x  Bcast:192.168.x.x  Mask:255.255.255.0

          inet6 addr: fe80::9e4e:36ff:fe43:c88c/64 Scope:Link

          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

          RX packets:23031 errors:0 dropped:0 overruns:0 frame:0

          TX packets:15034 errors:0 dropped:0 overruns:0 carrier:0

          collisions:0 txqueuelen:1000 

          RX bytes:24204707 (24.2 MB)  TX bytes:1892375 (1.8 MB)

So I guess at this point it all went well, but I still have the IP of my wireless network. I think I am missing the to route all the traffic through the vpn right ?