# Kismet

**Kismet** is a wireless network detector, packet sniffer, and intrusion detection system for 802.11 wireless LANs (WLANs). It's an open-source tool that provides passive monitoring capabilities to detect and analyze wireless networks around you. Here’s an overview of Kismet and its key features:

### Key Features of Kismet

1. **Passive Wireless Detection**: Kismet passively monitors wireless networks without actively transmitting any packets, making it useful for stealthy network reconnaissance and monitoring.
2. **Packet Capture**: It captures wireless packets from supported WLAN interfaces, allowing detailed analysis of network traffic and protocols.
3. **Multi-Platform Support**: Kismet runs on multiple platforms, including Linux, macOS, and BSD, making it versatile for different operating system environments.
4. **Real-time Network Discovery**: It detects and displays nearby wireless networks, including hidden SSIDs (if configured), and provides information such as signal strength, channel usage, and encryption types.
5. **Detailed Network Information**: Kismet provides detailed information about each detected network, including access points (APs), clients connected to APs, and their respective capabilities.
6. **Logging and Reporting**: It supports logging captured data to files for offline analysis and reporting. Logs can be saved in various formats, including pcap for integration with other packet analysis tools.
7. **Alerts and Notifications**: Kismet can generate alerts and notifications based on detected anomalies or specific network events, aiding in intrusion detection and network security monitoring.
8. **Graphical and Command-line Interface**: Kismet offers both a graphical user interface (GUI) for interactive use and a command-line interface (CLI) for scripted or automated tasks.

### Usage Scenarios

* **Wireless Network Monitoring**: Monitor and analyze wireless network traffic to identify network performance issues, security threats, or unauthorized access points.
* **Security Auditing**: Perform security audits to detect rogue access points, unauthorized devices, and potential wireless network vulnerabilities.
* **Network Troubleshooting**: Investigate and diagnose connectivity issues, interference problems, and performance bottlenecks in wireless networks.
* **Educational Purposes**: Learn about wireless networking protocols, packet analysis techniques, and network security concepts in educational and training environments.

### Installation

Kismet can be installed from package repositories or compiled from source, depending on your operating system:

*   **Linux**: Kismet is often available in the package repositories of major Linux distributions. For example, on Debian/Ubuntu:

    ```bash
    sudo apt-get install kismet
    ```

    On Red Hat/CentOS:

    ```bash
    sudo yum install kismet
    ```
*   **macOS**: Install via Homebrew:

    ```bash
    brew install kismet
    ```
* **BSD and Other Platforms**: Check the specific package management tools or compile from source as per the documentation provided on the Kismet website.

### Getting Started

Once installed, you can start Kismet from the command line or use the graphical interface (if available). Here are some basic commands:

*   **Start Kismet**:

    ```bash
    sudo kismet
    ```
*   **Access the Web Interface** (if configured):

    Open a web browser and navigate to `http://localhost:2501` (default URL) to access the Kismet web interface for interactive monitoring and analysis.

### Security Considerations

* **Monitor Legally**: Ensure that you have legal authorization to monitor wireless networks in your environment, as unauthorized monitoring may violate privacy and regulatory laws.
* **Use Encryption**: When logging or transmitting captured data, ensure encryption is enabled to protect sensitive information.

### Conclusion

Kismet is a powerful tool for wireless network monitoring and analysis, offering robust capabilities for detecting and analyzing 802.11 WLANs. Whether you're troubleshooting network issues, conducting security audits, or learning about wireless protocols, Kismet provides valuable insights into wireless network activity.
