Mastering Multimon-ng: Your Complete Guide to Kali Linux

Course #370: Introduction to Multimon-ng in Kali Linux

# Course #370: Introduction to Multimon-ng in Kali Linux ## Section 5/5: Mastering Multimon-ng ### Installation and Configuration on Kali Linux **Prerequisites:** Before we dive into the installation of `multimon-ng`, ensure that your Kali Linux setup is updated and that you have the necessary permissions to install new software. You also need to have `build-essential` and other dependencies installed. 1. **Update Your System:** Open the terminal and run the following commands to update your package list and upgrade your system: 2. **Install Dependencies:** Install `multimon-ng` along with its dependencies using the following command: Alternatively, you can compile from source if you need the latest version or specific features. In that case, install the required packages first: 3. **Clone the Repository:** If you’re opting for the source version, clone the `multimon-ng` repository from GitHub: 4. **Compile the Source Code:** To compile the program, run: 5. **Install the Compiled Program:** Finally, copy the binary to the appropriate location: 6. **Verifying Installation:** To verify that `multimon-ng` is installed correctly, run: You should see the help documentation, confirming a successful installation. ### Step-by-Step Usage and Real-World Use Cases #### Basic Usage Once installed, utilizing `multimon-ng` is straightforward. This tool enables you to decode various digital signal formats. Here’s how to start using `multimon-ng` effectively: 1. **Basic Command Structure:** The basic command to run `multimon-ng` is as follows: The `` specifies the type of signal you are trying to decode (for example, POCSAG, FLEX, etc.), and `` is your audio source (like a microphone or sound card). 2. **Example Command:** To decode POCSAG signals from a specified sound card, use:

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   multimon-ng -a POCSAG -t alsa://hw:1,0
 

Here, `alsa://hw:1,0` refers to the audio device. You can find available devices using:

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   arecord -l
 

3. **Configuring the Output:** You can redirect the output to a file to analyze later:

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   multimon-ng -a POCSAG -t alsa://hw:1,0 > output.txt
 

#### Real-World Use Cases – **Emergency Services Monitoring:** `multimon-ng` can be used to monitor emergency services communications, particularly in areas where pagers are still utilized. Capture and analyze POCSAG signals to gather insights into emergency dispatches. – **Industrial Applications:** Many industries utilize digital paging systems for communication. This tool can decode those pages, providing insight into operational efficiencies or delays. – **Amateur Radio:** Many amateur radio operators use digital modes. `multimon-ng` allows you to decode and listen to these signals efficiently, enhancing your radio communication experience. – **Research in Digital Communications:** Academics and hobbyists might use `multimon-ng` as a part of their research into signal processing and digital communications, exploring how data transmission works in various formats. ### Detailed Technical Explanations #### Signal Types Supported `multimon-ng` supports several digital signal formats, including but not limited to: – **POCSAG (Post Office Code Standardisation Advisory Group):** A common protocol used for pagers. – **FLEX:** Another protocol used for paging. – **ACARS (Aircraft Communications Addressing and Reporting System):** Used for communication between aircraft and ground stations. Refer to the official [multimon-ng documentation](https://github.com/EliasOenal/multimon-ng/blob/master/README.md) for a full list of supported protocols and their specific configurations. #### Audio Input Handling When selecting your audio input device, ensure that the device is capturing audio correctly. This involves checking device permissions and settings in your sound configuration. Utilize the `pavucontrol` tool for a graphical interface to manage your audio devices more easily. ### External Reference Links 1. [Kali Linux Official Documentation](https://www.kali.org/docs/) 2. [Multimon-ng GitHub Repository](https://github.com/EliasOenal/multimon-ng) 3. [SDRSharp for Software Defined Radio](https://airspy.com/download/) 4. [Arecord – ALSA Command for Recording Sound](https://linux.die.net/man/1/arecord) 5. [Pavucontrol – PulseAudio Volume Control](https://wiki.archlinux.org/title/Pavucontrol) ### Code Examples in Markdown Code Blocks Here are some code examples that can be directly utilized in WordPress when creating content: [/dm_code_snippet]markdown ## Install Multimon-ng on Kali Linux To install `multimon-ng`, run:

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sudo apt install multimon-ng

[/dm_code_snippet] [/dm_code_snippet]markdown ## Basic Usage Example To decode POCSAG signals use:

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multimon-ng -a POCSAG -t alsa://hw:1,0

[/dm_code_snippet] [/dm_code_snippet]markdown ## Redirecting Output to a File Capture the output to a file for later analysis:

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multimon-ng -a POCSAG -t alsa://hw:1,0 > output.txt

[/dm_code_snippet] ## Conclusion This concludes our introduction to `multimon-ng` on Kali Linux. With this powerful tool, you can delve into various digital signal formats and enhance your pentesting and digital forensics capabilities. Whether you are capturing emergency service communications or analyzing digital paging systems, `multimon-ng` provides the groundwork for a range of applications in the realm of cybersecurity and digital communications. — Made by pablo rotem / פבלו רותם