> For the complete documentation index, see [llms.txt](https://oscp.adot8.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://oscp.adot8.com/services/port-knocking.md).

# Port Knocking

Config file can be found at

```
/etc/knockd.conf
```

<figure><img src="/files/JKKWnjToRXXydOGZhTrc" alt=""><figcaption><p>File found from Directory traversal</p></figcaption></figure>

<pre><code><strong>knock 192.168.156.209 9842 8475 7469
</strong></code></pre>

`for i in 9842 8475 7469; do nmap -Pn --host-timeout 201 --max-retries 0 -p $i 192.168.156.209; done`

`for i in 9842 8475 7469; do nc 192.168.156.209 $i -v; done`

#### It's possible to sniff traffic and find the sequence