PWNtcha stands for "Pretend We’re Not a Turing Computer but a Human Antagonist", as well as PWN capTCHAs. This project’s goal is to demonstrate the inefficiency of many captcha implementations.
Ophcrack is a Windows password cracker based on a time-memory trade-off using rainbow tables. This is a new variant of Hellman's original trade-off, with better performance.
If you cannot use a SSH client to bypass the firewall (403 error, connect command not allowed) you can use GNU httptunnel to bypass the firewall. As an example we forward again the Windows Remote Desktop (port 3389).