What are the differences between BO2K and the original BO? Is it backward compatible?
BO2K is an almost complete rewrite of the original Back Orifice. It sports a much heftier plugin architecture that can extend every little part of the system in any way. By default, BO2K comes with the capability to talk over TCP as well as UDP, and supports strong encryption through plugins. Commands have also been added, upgraded and fixed, especially in the areas of file transfer and registry handling.