No connection could be made because the target machine actively refused it (Django)

Question

I have followed the Django Book up until chapter seven, and I am currently messing around with forms, GET, POST and all that goodness. At one point, the guide made me figure out

Answer 1

The code tries to connect to http://127.0.0.1:8000/contact/ - the port 8000 is not reachable (firewall) or there is no server running.