Net_Scanner

Overview

This Python-based network scanner identifies active devices on a local network, displaying their IP addresses, MAC addresses, and vendor details. The scanner supports two modes:

1. Fast Scan - Uses a local dataset to determine vendor details.
2. Advanced Scan - Uses an API to fetch vendor details online.

Features

• Detects devices connected to the same network.
• Retrieves IP and MAC addresses.
• Finds vendor information using a local dataset or an online API.
• Displays results in an easy-to-read format.

Requirements

Before running the script, ensure you have the following dependencies installed:

pip install psutil socket ipaddress pyfiglet requests time csv scapy

Installation

1. Clone or download the repository.
2. Ensure the mac-vendors-export.csv file is in the same directory as the script.
3. Install the required Python libraries using the command above.

Usage

Run the script using:

python net_scn.py

Follow the on-screen prompts:

• Enter 1 for a Fast Scan (local lookup).
• Enter 2 for an Advanced Scan (API lookup, may take longer).
• Enter 3 to exit.

How It Works

1. The script determines the local network IP and subnet mask.
2. It sends ARP requests to detect active devices.
3. For vendor lookup:
   • Fast Scan: Checks the local dataset (mac-vendors-export.csv).
   • Advanced Scan: Queries an online MAC address lookup API.
4. Results are displayed in a table format.

Notes

• The API allows one request per second in the free tier.
• Ensure mac-vendors-export.csv is in the same directory for fast scanning.

License

MIT License

Author

Janidu Dilshan