> For the complete documentation index, see [llms.txt](https://hacking-notes.jord4n.pro/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hacking-notes.jord4n.pro/es/reconnaissance/network-manual-scan.md).

# Escaneo manual de red

{% hint style="info" %}
Este documento detalla técnicas manuales de escaneo de red sin herramientas automatizadas como Nmap. Aprenderá a usar comandos simples y eficaces (como `/dev/tcp`, `ping`, `netcat`, etc.) para identificar hosts activos, comprobar puertos abiertos y diagnosticar servicios en una red. Ideal para comprender los conceptos básicos del diagnóstico de red y personalizar sus análisis según sus necesidades.
{% endhint %}

## Puerto específico (HTTP - puerto 80)

```bash
echo '' > /dev/tcp/192.168.1.1/80 && echo "[+] HTTP Abierto" || echo "[-] HTTP Cerrado"
```

## Varios puertos (SSH, HTTP, HTTPS)

Un comando simple para probar una lista de puertos:

```bash
for port in 22 80 443; do
  echo '' > /dev/tcp/192.168.1.1/$port && echo "[+] Puerto $port Abierto" || echo "[-] Puerto $port Cerrado"
hecho
```

## Lista de IP y un solo puerto

Para comprobar si un puerto dado (por ejemplo, 22) está abierto en varias IP:

```bash
for ip in 192.168.1.1 192.168.1.2 192.168.1.3; do
  echo '' > /dev/tcp/$ip/22 && echo "[+] SSH Abierto en $ip" || echo "[-] SSH Cerrado en $ip"
hecho
```

## Bucle para escanear un rango de puertos

Para escanear los puertos de una máquina en un rango específico:

```bash
for port in {20..30}; do
  echo '' > /dev/tcp/192.168.1.1/$port && echo "[+] Puerto $port Abierto" || echo "[-] Puerto $port Cerrado"
hecho
```

## Servicio en varias IP y puertos

Para probar un conjunto de IP y varios puertos:

```bash
for ip in 192.168.1.1 192.168.1.2; do
  for port in 80 443 8080; do
    echo '' > /dev/tcp/$ip/$port && echo "[+] $ip:$port Abierto" || echo "[-] $ip:$port Cerrado"
  hecho
hecho
```

## Script avanzado para diagnosticar una red

Cree un pequeño script para escanear puertos en un objetivo y guardar los resultados en un archivo:

```bash
#!/bin/bash

target="192.168.1.1"
output="scan_results.txt"

echo "Escaneando $target..." > $output
for port in {1..1024}; do
  if echo '' > /dev/tcp/$target/$port 2>/dev/null; then
    echo "[+] Puerto $port Abierto" | tee -a $output
  else
    echo "[-] Puerto $port Cerrado" >> $output
  fi
hecho
echo "Escaneo completado. Los resultados se guardaron en $output."
```


---

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