CryptCat – Netcat + Encryption

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.

Cryptcat – is a lightweight version of netcat extended with twofish encryption.



Cryptcat usage:

On the server, listen for a connection (-l) on port 4444 (-p 4444) and don’t do name resolution (-n). Redirect all data to a file (> dataxfer). On the client, connect to the remote IP address ( on port 4444 (4444) and pipe in the data to be transferred (< /tmp/juicyinfo):




I started blogging around 2011 at #Ubuntupirates, #ProjectX and #pir8geek, I’m currently working as Network/Linux SysAdmin.

I’m a Linux,opensource advocate and interested in network security and InfoSec.

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