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Create a single-use TCP (or UDP) proxy

Terminal - Create a single-use TCP (or UDP) proxy
nc -l -p 2000 -c "nc example.org 3000"
2009-03-01 21:28:39
User: prayer
23
Create a single-use TCP (or UDP) proxy

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"

Alternatives

There are 3 alternatives - vote for the best!

Terminal - Alternatives

Know a better way?

If you can do better, submit your command here.

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.

Comment by bytor4232 339 weeks and 3 days ago

To make a "permanent" port redirection, checkout rinetd.

Comment by sudopeople 339 weeks and 2 days ago

Your point of view

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