> For the complete documentation index, see [llms.txt](https://lanzt.gitbook.io/cheatsheet-pentest/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://lanzt.gitbook.io/cheatsheet-pentest/port-enumeration/reconnaissance.md).

# Reconnaissance

## naabu

From here <https://github.com/projectdiscovery/naabu>

```bash
naabu -host 10.10.10.10
```

## nmap

```bash
nmap 10.10.10.10
nmap -p- 10.10.10.10
nmap -p 22,80,5000 10.10.10.10
nmap -p- --open 10.10.10.10
nmap -p- --open -v 10.10.10.10 -Pn -sS -oA nmap-output 
```

## masscan

From here <https://github.com/robertdavidgraham/masscan>

```bash
masscan 10.10.10.10
masscan 10.10.10.10 -p0-65535
masscan 10.10.10.10 -p22,80,8000-8100
masscan 10.10.10.0/24 -p0-65535
masscan 10.10.10.10 -p0-65535 -oA scan
masscan 10.10.10.10 -p0-65535 --max-rate 100000
```

## Using /dev/tcp/ip/port

```bash
#!/bin/bash

IP="10.10.10.10"

for port in $(seq 1 65535); do
        (timeout 1 bash -c "</dev/tcp/$IP/$port") >/dev/null 2>&1 && echo "Puerto Abierto: $IP:$port" &
done; wait
```

```bash
port=80
timeout 1 bash -c "echo >/dev/tcp/10.10.10.10/$port" && echo "port $port is open" || echo "port $port is closed"
```

## Tools

{% embed url="<https://github.com/six2dez/reconftw>" %}


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://lanzt.gitbook.io/cheatsheet-pentest/port-enumeration/reconnaissance.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.