One of my friends have blogged on how he managed to connect via VPN and to generic internet in parallel.
http://tdevinda.blogspot.com/2009/11/whats-inside-what-virtualization.html
This ended up in bringing a nice discussion on routing, VPN and VMs.
Following is my solution.
Issue :
Under normal conditions; when you get connected to a VPN, it is not possible to get connected with the internet.
Reason:
When you get connected to the VPN, automatically it is set as the default route.
Solution:
- Once you are connected to VPN, remove the default route for VPN. Under linux vpn is normally tun0.
- Then add a default entry for your usual network interface. (eth0, ppp0, etc)
- Then add the routing entry for the specific IP or the subnet which you need to get connected through VPN for tun0
