tumbler is a protocol and implementation that provides a stealthy and secure way to execute a predefined command on a remote machine. tumbler is intended to allow remote reconfiguration of firewalls or services in a similar manner to port knocking.
A firewall knocking mechanism that is loosely based on tumbler (tumbler.sourceforge.net) instead it is written in python. A focus of this implementation will be on multiple client implementations (OSX Widget, XP taskbar, etc.)