I carry putty with me on a floppy at school. It doesent matter what kind of security they have unless they dont allow you to run programs and use the floppy drives. No need to install anything just run the .exe. If i forget my floppy ill just download it to the computer im on and run it.
Hkz those are clients your refering to. Im certain skull is refering to the telnet deamon or server or telnetd what ever you wanna call it.