This application is a TCP proxy that can be used to inspect and modify communication sessions; its behavior is controlled by connecting to the application control port (currently hard coded to 9089).
$ ./killerrabbit.py
$ telnet localhost 9089
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
Control session established (? for available commands)
> q
Connection closed by foreign host.