Create a single-use TCP (or UDP) proxy

nc -l -p 2000 -c "nc example.org 3000"
Redirect the local port 2000 to the remote port 3000. The same but UDP: nc -u -l -p 2000 -c "nc -u example.org 3000" It may be used to "convert" TCP client to UDP server (or viceversa): nc -l -p 2000 -c "nc -u example.org 3000"

24
By: prayer
2009-03-01 21:28:39

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What Others Think

Handy when migrating servers from one physical location to another. Move said server, put a basic linux server in its place, and simply proxy the connections over while DNS propagates.
bytor4232 · 485 weeks and 4 days ago
To make a "permanent" port redirection, checkout rinetd.
sudopeople · 485 weeks and 4 days ago

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Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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