Port Scanner Script - Explanation

Overview

This is a Python script that performs port scanning on a target IP address. It checks if the ports within a specified range are open or closed and provides options to scan ports in parallel using multiple threads for faster execution. The results can be saved to a file or displayed in the terminal.

Key Features

1. Multithreading: Uses threads to scan multiple ports simultaneously, improving performance.
2. Progress Bar: Displays a progress bar to show the current scanning status.
3. Port Range: Allows scanning of ports from a start port to an end port, defaulting to the range 1-65535.
4. Options: Includes options for verbose output, silent scanning, and saving the results to a file.

Arguments

• --ip: Specifies the target IP address to scan.
• --start: Defines the starting port for the scan (default: 1).
• --end: Defines the ending port for the scan (default: 65535).
• --open: Only display open ports.
• --silent: Perform a silent scan with no output shown.
• --verbose: Shows detailed information during scanning.
• --threads: The number of threads to use for the scan (options: 1000, 2000, 3000, 4000, 5000).
• -f or --file: Save the results to a text file.

How It Works

1. Scanning Ports: The script creates a socket connection for each port in the specified range and checks if it is open. If the port is open, it is added to the list of open ports.
2. Multithreading: The script uses threads to perform the scan concurrently. It manages the number of threads being executed at any time to avoid overwhelming the system.
3. Progress Bar: The tqdm library is used to display a progress bar that updates as ports are scanned.
4. Saving Results: If the --file option is used, the results are saved to the specified text file.

Example Usage

python3 port_scanner.py --ip 192.168.1.1 --start 80 --end 100 --verbose