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tunnel.md

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Tunnel

not is a tcp/udp tunnel tool. For example if you want to ssh a machine behind a firewall, you can use it to easily reverse proxy port 22 to the outside world.

For more help, run: not -h.

The data is encrypted on the client, so the server can't sniff the data passed between clients, it acts as a router. Now only the tcp packet will be encrypted, upd will sent as raw data.

Quick Start

                                      a.com
      +-----------+  export port  +-----------+  connect port  +-----------+
      | Machine A +-------------->| Machine R |<---------------+ Machine B |
      +-----------+               +-----------+                +-----------+
 not -o a.com -x 8080 -n A            not -s                 not -o a.com -t A

Suppose A and B cannot reach each other via network directly. But they both have tcp access to the R (a.com).

  1. Start the relay server on R to proxy tcp/udp: not -s,

  2. Start a proxy client on A to connect to R and export self as A: not -o a.com -n A

  3. Start a proxy client on B to connect to R and forward tcp/udp to A: not -o a.com -t A

That's all you need. Now your packet to B's port 7000, will be transparently forward to A's port 8080 through the R.

IF you want to change the default port, run not -h for more options.