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Sometimes you need a simple server which listens on a port and prints out received data.
Example: Consider you want to know, which data is posted by a homepage to a remote script without analysing the html code! A simple way to do this is to save the page to your computer, substitude all action="address" with action="localhost:portnumber", run 'ncat -l portnumber' and open the edited page with your browser. If you then submit the form, ncat will print out the http-protocol with all the posted data.
There are 3 alternatives - vote for the best!
This is the syntax for older versions of netcat.
If you can do better, submit your command here.
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