Python Port Scanner

A simple multithreaded port scanner written in Python 3. This tool allows you to scan a range of ports on a specified IP address to identify which ports are open.

Features

• Input validation for IP addresses
• Fast scanning using multithreading (ThreadPoolExecutor)
• Colored output using termcolor
• Customizable port range

Requirements

• Python 3.x
• termcolor module

Install dependencies with:

pip install termcolor

Usage

Run the script with:

python3 portscanner.py

You will be prompted to enter:

• An IP address to scan
• A starting port
• An ending port

Example

$ python3 portscanner.py
Enter the IP address: 192.168.1.1
Start port: 20
End port: 100

[+] Port 22 open
[+] Port 80 open

How It Works

• Validates the IP address format using the ipaddress module
• Uses a thread pool to scan ports concurrently
• Tries to establish a TCP connection to each port
• If the connection is successful, the port is considered open

Disclaimer

This tool is intended for educational purposes and authorized testing only. Unauthorized port scanning is illegal and unethical.