tuananil/port-scanner

# Simple TCP Port Scanner A lightweight and efficient Command-Line Interface (CLI) based TCP Port Scanner written in Python. This project is designed to perform basic network reconnaissance by scanning specified host ports to determine their operational status. ## Features * **TCP Connection Scanning:** Utilizes Python's native `socket` library to establish standard TCP connections. * **Host Resolution:** Automatically resolves domain names (e.g., `localhost`) to their respective IPv4 addresses. * **Targeted Scanning:** Iterates through standard ports (1-100) with a built-in timeout mechanism to optimize performance and prevent hanging connections. * **Clean CLI Output:** Provides real-time feedback, explicitly logging discovered open ports. ## Architecture & Concepts Covered * **Network Sockets:** Implements standard internet communication endpoints via `socket.socket`. * **Exception Handling:** Utilizes `try-except` blocks to handle connection timeouts and unreachable hosts gracefully without crashing the script. * **Address Translation:** Employs `socket.gethostbyname` for DNS resolution. ## Getting Started ### Prerequisites Make sure you have Python 3.x installed on your system. ### Installation & Execution 1. Clone this repository to your local machine: git clone [https://github.com/tuananil/port-scanner.git](https://github.com/tuananil/port-scanner.git) cd port-scanner