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*http://farm9.org/Cryptcat/''"Cryptcat is a simple Unix utility which reads and writes data across network connections, using TCP or UDP protocol while encrypting the data being transmitted. It is designed to be a reliable "back-end" tool that can be used directly or easily driven by other programs and scripts. At the same time, it is a feature-rich network debugging and exploration tool, since it can create almost any kind of connection you would need and has several interesting built-in capabilities."'' Machine A: cryptcat -l -p 1234 < testfile Machine B: cryptcat <machine A IP> 1234