Frustrated by UML

I recently have been experimenting with User Mode Linux. My goal is to be able to run some of my tests on my local machine without needing to setup a whole EC2 instance.

At the same time I am evaluating the possibility of using UML on my instance to separate out the various services.

The main problem I am having at the moment is with the networking. Although I am able to connect to the host machine, I seem to be unable to create a route to the rest of the network.