Port Scanner

A fast and lightweight Python-based port scanner that checks all ports (1–65535) on a target host.
Built with multithreading for high performance and designed for security testing and research purposes only.

Features

• Scans all ports on a target (1–65535)
• Multithreaded for significantly faster scan times
• Clean and readable output
• Error handling for common network issues
• ASCII banner using pyfiglet

Usage

1. Install Dependencies

pip install pyfiglet

2. Run the Scanner

python3 scanner.py <target>

Example:

python3 scanner.py example.com

3. Sample Output

PORT SCANNER (ASCII ART)

------------------------------------------------------------
Target: 93.184.216.34
Start Time: 2026-02-11 12:00:00
------------------------------------------------------------
[+] Port 80 is OPEN
[+] Port 443 is OPEN
...
------------------------------------------------------------
Scan complete.
Open Ports:
 - 80
 - 443
------------------------------------------------------------

Code Overview

• Uses ThreadPoolExecutor for concurrent port scanning

• Automatically resolves domain names to IPv4 addresses

• Gracefully handles timeouts, invalid hosts, and user interruptions

Disclaimer

This tool is intended only for educational purposes and authorized security testing. Do not scan systems without explicit permission. The author is not responsible for any misuse.

License

This project is released under the MIT License.