Contributed by Dean De Beer and extracted from the old Infosecwriters archives, but still relevant today.
Having had numerous people recently ask me about the various uses for Netcat I decided to put together a document showing a few handy uses for good ol' Netcat. Netcat has been described as telnet on steroids or a Swiss army knife, both excellent descriptions for this versatile little tool.
Originally written by Hobbit for Linux, Weld Pond later ported it to Windows. In essence it is a tool that reads and writes data across a network connection, using the TCP or UDP Protocol. For the orginal, detailed technical description of Netcat visit: http://www.vulnwatch.org/netcat/
This document is in PDF format. To view it click here.