Java Network Vulnerability Scanner

A Java-based network security tool that integrates with Nmap to scan authorized target systems, identify open ports and services, perform rule-based security risk analysis, provide security recommendations, and generate detailed scan reports.

⚠️ Disclaimer: This project is intended strictly for educational purposes and authorized security testing. Only scan systems, networks, or devices that you own or have explicit permission to test.

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Features

• IPv4 address validation
• Localhost, private network, and public IP classification
• Authorization warning before scanning
• Basic Nmap scanning
• Service and version detection using Nmap -sV
• Open port detection
• Service identification
• Service version detection
• Rule-based security risk classification
• Risk levels: Critical, High, Medium, Low, and Info
• Security recommendations for detected services
• Scan summary and overall risk level
• Automatic vulnerability report generation
• Timestamp-based report filenames

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Verify Java Installation

Run:

java -version

Verify the Java compiler:

javac -version Verify Nmap Installation

Run:

nmap --version

Example:

Nmap version 7.x

Nmap must be accessible through the system PATH for the Java application to execute it successfully.

Technologies Used

Technology	Purpose
Java	Core application development
Nmap	Network and port scanning
ProcessBuilder	Executing Nmap commands from Java
BufferedReader	Capturing and reading Nmap output
Java File I/O	Generating security reports
OOP	Organizing the application structure
VS Code	Development environment
Git & GitHub	Version control and project hosting

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Application WorkFlow

User Input │ ▼ IP Address Validation │ ▼ IP Type Classification │ ▼ Authorization Warning │ ▼ Scan Mode Selection │ ├───────────────┐ ▼ ▼ Basic Scan Service Version Scan │ │ └───────┬───────┘ ▼ Nmap Execution │ ▼ Capture Scan Output │ ▼ Port Analysis │ ▼ Risk Classification │ ▼ Security Recommendations │ ▼ Scan Summary │ ▼ Automated Report Generation

Project Structure

Java-Vulnerability-Scanner
│
├── .gitignore
├── README.md
│
├── reports/
│   └── vulnerability_report_*.txt
│
├── screenshots/
│   ├── demo-start.png
│   ├── security-analysis.png
│   └── report-generated.png
│
└── src/
    └── com/
        └── balaji/
            └── cybersecurity/
                │
                ├── Main.java
                │
                ├── analyzer/
                │   └── PortAnalyzer.java
                │
                ├── report/
                │   └── ReportGenerator.java
                │
                ├── scanner/
                │   └── NmapScanner.java
                │
                └── validator/
                    └── InputValidator.java