Cheatsheets/nmap-cheatsheet.md

# NMAP Cheat Sheet  

## Table of Contents

1. [Ping Scanning](#ping-scanning)
2. [ARP Scanning](#arp-scanning)  
3. [SYN Scanning](#syn-scanning)
4. [UDP Scanning](#udp-scanning)
5. [Useful Nmap Switches](#useful-nmap-switches)
6. [Identifying OS and Applications](#identifying-os-and-applications)
7. [Nmap Scripts](#nmap-scripts)
8. [Batch Script for Nmap](#batch-script-for-nmap)

## Ping Scanning

```bash
nmap -sn 192.168.10.1
nmap -sP 192.168.10.2
```

## ARP Scanning 

```bash
nmap -sP -PR 192.168.10.1 
```

> **Note**: Press the spacebar to show the current progression of the scan.

## SYN Scanning

```bash
nmap -sS 192.168.10.1
```

## UDP Scanning

```bash
nmap -sU 192.168.10.1
```

## Useful Nmap Switches

- `-h` : Help
- `-v` : Verbose  
- `-vv` : Very Verbose
- `-n` : No DNS Reverse Lookup
- `-T` : Sets the speed of the scan (`-T5` being the fastest, `-T0` the slowest)
- `-p` : Specify ports
  - `-p 80` : Specific port
  - `-p 1-10` : Range of ports
  - `-p-` : All ports
- `-o` : To output a file   

## Identifying OS and Applications

- `-sV` : Enable Version Detection
- `-O` : Enable OS Detection
- `-A` : Enable OS Detection, Version Detection, Script Scanning, and Traceroute
- `--osscan-guess` : Aggressive OS guessing

## Nmap Scripts

**Syntax**: `nmap —script scriptname targetIP`

Examples:

```bash
nmap —script http-headers 192.168.10.1
nmap —script smtp-commands 192.168.10.1 
nmap -sV --script=banner 192.168.10.1
nmap -sV --script=smb* 192.168.10.1
nmap --script=http-title 192.168.10.1
nmap --script=http-enum 192.168.10.0/24
```

> [How to Use Nmap Script Engine (NSE) Scripts in Linux](https://www.tecmint.com/use-nmap-script-engine-nse-scripts-in-linux/)

## Batch Script for Nmap

1. First, download Neovim or your favorite text editor.

2. Create a file named `nmapScan.sh`.

   ```bash
   #!/bin/bash
   
   nmap -sT -p 1-10000 -v -v -T5 -sV -O --osscan-guess --script=banner -oN 192.168.10.1TCP.txt 192.168.10.1
   
   nmap -sU -p 1-500 -v -v --scan-delay 1s -sV --script=banner -oN 192.168.10.1UDP.txt 192.168.10.1
   
   nmap -sT -p 1-10000 -v -v -T5 -sV -O --osscan-guess --script=banner -oN 192.168.10.2TCP.txt 192.168.10.2
   
   nmap -sU -p 1-500 -v -v --scan-delay 1s -sV --script=banner -oN 192.168.10.2UDP.txt 192.168.10.2
   ```

3. Save and exit. 

4. Make the script executable:

   ```bash
   sudo chmod +x nmapScan.sh
   ```

5. Run the script:

   ```bash
   sudo ./nmapScan.sh
   ```