You're replying to a comment by Konstantin.

December 29, 2012, 15:07

You say:

> That's correct, because we did not set up a bidirectional pipe. If you add another pipe, you can get the data back on another port:
> $ nc -l -p 12345 | nc 80 | nc -l -p 12346

But that's not the whole truth. Actually, you *can* do bidirectional proxy with a little trick involving named pipes:

$ mkfifo ~/loop.pipe && cat ~/loop.pipe | nc -l -p 12345 | nc 80 > ~/loop.pipe

This way everything you send to port 12345 is redirected to, and everything sent back from will be redirected back to local port 12345.

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