> For the complete documentation index, see [llms.txt](https://www.ired.team/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.ired.team/offensive-security/lateral-movement/simple-tcp-relaying-with-netcat.md).

# Simple TCP Relaying with NetCat

This is a simple lab that looks at how to setup a traffic relay using netcat.

We are amining to create a relay between ports 4444 and 22 - any traffic coming to 4444 will be redirected to port 22.

```bash
# setup listener on port 22
nc -lvvp 22

# setup listener on port 4444 and direct stdout to port 22 using netcat
nc -lvvp 4444 | nc localhost 22

# send a string "test" to port 4444 using netcat
echo test | nc localhost 4444
```

Below is an animated demo of how this all works in action:

![](/files/-LVw_rNzgDjkrHZ_0-rw)