1. Introduction
The HUNSN RJ12 is a compact, fanless micro firewall appliance designed for various networking applications, including use as a router, firewall, or mini PC. It supports a range of operating systems such as FreeBSD-based router systems (e.g., pfSense, OPNsense), Linux distributions, and Windows. Featuring Intel Celeron processors (N4000, J4105, or J4125) and Intel 2.5GbE I226-V LAN ports, this device offers robust performance and connectivity for small offices or home networks. Its fanless design ensures silent operation, making it ideal for noise-sensitive environments.
2. Product Overview
The HUNSN RJ12 features a durable aluminum chassis with a compact form factor. It is equipped with essential I/O interfaces for versatile connectivity.
2.1 Device Layout
Figure 1: Front Panel with I/O Ports
The front panel includes a power button, HDMI output, RST (reset) button, two USB 3.0 ports, two 2.5GbE LAN ports (ETH1, ETH0), and a DC-12V power input.
Figure 2: Exploded View of the Appliance
The internal components are housed within a fanless aluminum chassis designed for efficient heat dissipation.
2.2 Supported Operating Systems
Figure 3: Compatible Operating Systems
The appliance is compatible with a wide range of operating systems, including Windows, various Linux distributions (such as Ubuntu), and specialized router/firewall systems like pfSense, OPNsense, and OpenWrt.
2.3 Core Functions
Figure 4: Core Functionalities
The device supports advanced networking features such as multi-wire load balancing, broadband overlay, behavior management, intelligent flow control, VPN support, PPPOE certification, and network authentication, making it suitable for complex network setups.
3. Specifications
| Feature | Description |
|---|---|
| Model Number | HUNSN RJ12 |
| Chassis | Aluminum with knockout hole |
| Processor Options | Intel Celeron N4000 (up to 2.60 GHz) Intel Celeron J4105 (up to 2.50 GHz) Intel Celeron J4125 (up to 2.70 GHz) |
| AES-NI Support | Yes |
| Memory | 1 x SODIMM DDR4 2400 MHz, max. 16GB |
| Storage | 1 x M.2 2280 NVMe SSD |
| Network Card | Intel 2.5GbE I226-V |
| I/O Interface | Power ON/OFF, RST, HDMI, 2 x USB 3.0, 2 x LAN, DC_IN |
| BIOS Support | AMI BIOS with PXE, WOL, Watchdog Programming, GPIO |
| Power Supply | DC 100-240V AC / 50-60Hz, 12V/3A |
| Working Temperature | -10°C to 70°C |
| Working Environment | 5%~90% relative humidity (non-condensing) |
| TDP | 10W |
| Cooling System | Fanless, 40 x 7mm holes (supports optional 12V 4-pin CPU fan with temperature control) |
| Dimensions | 112.3 x 100 x 36.5mm |
| Weight | 1 kg |
| Included in Package | HUNSN RJ12 firewall appliance, power supply, power cord, warranty card |
| Functions | Auto power on (default), network wake-up, system power management, temperature management |
| System Compatibility | 5.10.x+ core-based FreeBSD router systems, Linux distros, Windows OS |
| Firewall Compatibility | pfSense, OPNsense, and other popular open-source solutions |
4. Setup Instructions
- Unpack the Device: Carefully remove the HUNSN RJ12 appliance, power supply, and power cord from the packaging.
- Connect Peripherals:
- Connect a display to the HDMI port.
- Connect a keyboard and mouse to the USB 3.0 ports.
- Connect your network cables to the ETH0 and ETH1 LAN ports as required by your network topology.
- Power Connection: Connect the provided power supply to the DC-12V input port on the appliance, then plug the power cord into an electrical outlet.
- Power On: Press the power button on the front panel to turn on the device.
- Operating System Installation: The appliance typically comes without a pre-installed operating system or with a basic OS for testing. You will need to install your preferred OS (e.g., pfSense, OPNsense, Linux, Windows) via a bootable USB drive or network installation (PXE boot, if configured in BIOS). Refer to the specific OS documentation for detailed installation steps.
- BIOS Configuration: Access the AMI BIOS during startup (usually by pressing DEL or F2) to configure settings such as boot order, PXE boot, Wake-on-LAN (WOL), Watchdog, or GPIO interfaces if needed for your application.
5. Operating Instructions
- Power On/Off:
- To power on, press the power button.
- To power off, perform a graceful shutdown through your installed operating system. Alternatively, press and hold the power button for a few seconds for a forced shutdown (not recommended for regular use).
- Reset: Use the RST button for a hardware reset if the system becomes unresponsive.
- Auto Power On: The device supports an 'auto power on' feature, which is enabled by default. This means the appliance will automatically power on when power is supplied, useful for deployments where manual power-on is not feasible after a power outage.
- Network Wake-up (WOL): If configured in the BIOS and supported by your OS, the device can be woken up remotely via Wake-on-LAN.
- System Power Management: Utilize the power management features within your chosen operating system to optimize energy consumption and system behavior.
- Temperature Management: The fanless design relies on the aluminum chassis for cooling. Ensure adequate airflow around the device to prevent overheating, especially in high-temperature environments.
6. Maintenance
The HUNSN RJ12's fanless design minimizes maintenance requirements. However, regular checks can ensure optimal performance and longevity:
- Dust Removal: Periodically inspect the chassis for dust accumulation, especially around the cooling fins. Use compressed air or a soft brush to gently remove dust.
- Cable Connections: Ensure all cables (power, network, display, USB) are securely connected.
- Software Updates: Keep your installed operating system and any firewall/router software updated to the latest versions to benefit from security patches and performance improvements.
- Environmental Conditions: Operate the device within the specified working temperature and humidity ranges. Avoid placing it in direct sunlight or enclosed spaces without ventilation.
7. Troubleshooting
- No Power:
- Check if the power adapter is securely connected to both the appliance and the electrical outlet.
- Verify that the power outlet is functional.
- Ensure the power button is pressed correctly.
- No Display Output:
- Ensure the HDMI cable is firmly connected to both the appliance and the monitor.
- Check if the monitor is powered on and set to the correct input source.
- Try a different HDMI cable or monitor if possible.
- Network Connectivity Issues:
- Verify that Ethernet cables are properly connected to the LAN ports and your network devices.
- Check the network configuration within your installed operating system (IP addresses, subnet masks, gateways, DNS).
- Ensure that your firewall rules (if using pfSense/OPNsense) are correctly configured and not blocking necessary traffic.
- System Unresponsive:
- If the system freezes, press the RST button for a hard reset.
- If issues persist, consider reinstalling the operating system or checking for hardware faults (e.g., memory, SSD).
8. User Tips
- OS Choice: For dedicated firewall or router applications, pfSense or OPNsense are highly recommended due to their robust features and active communities. For general-purpose mini PC use, a lightweight Linux distribution or Windows can be installed.
- AES-NI: Leverage the Intel AES-NI support for improved performance in VPN and encryption tasks, especially important for firewall applications.
- Ventilation: Despite being fanless, ensure the device is placed in an area with good air circulation to maximize passive cooling efficiency and prevent thermal throttling.
- BIOS Settings: Familiarize yourself with the BIOS settings, particularly for features like PXE boot, Wake-on-LAN, and auto power on, which can be crucial for specific deployment scenarios.
9. Warranty and Support
The HUNSN RJ12 appliance comes with a warranty card included in the packing list. For any technical support, customization needs, or warranty claims, please contact the seller directly. Provide your purchase details and a clear description of the issue to receive timely assistance.
