Building a home lab is all about taking things one step at a time, and that is exactly what I am doing here. In my last setup, I configured TrueNAS on the WTR Pro, establishing the foundation in my lab. Now, the next step is implementing a dedicated firewall—something that will provide better control, security, and flexibility over my network.
For this, I picked up the ZimaBoard 832, a compact, fanless single-board computer that will act as my firewall. In this post, I will be unboxing it, reviewing its build quality, ports, specifications, and pre-installed OS before setting up OPNsense in the next phase.
Why Set Up a Dedicated Firewall?
Most people rely on the firewall capabilities of their ISP-provided routers, but in most cases, those are limited in terms of security and network control. Setting up a dedicated firewall allows for greater flexibility and security. The main benefits include:
Since I will also be testing a variety of applications in my lab, I need full visibility and control over network traffic to ensure security and proper resource allocation.
ZimaBoard 832 – First Impressions
The ZimaBoard 832 is a compact and well-built device, which is one of the reasons I chose it. While it is larger than a Raspberry Pi, it remains small enough to fit neatly into a network setup. It can easily be mounted on a wall, placed in a rack, or positioned on a desk without taking up too much space.
One of the standout features of this board is its passive cooling system. The top of the device is essentially one large heatsink. This not only enhances its appearance but also plays a critical role in dissipating heat, making it ideal for fanless operation.
In terms of build quality, it has a solid, premium feel. The chassis is metal, which adds durability and helps with cooling. The weight is noticeable, but not heavy enough to be a concern. The bottom panel is made of plastic, but overall, the construction feels robust.
This is one of those devices that looks like a high-end piece of networking equipment, and it is something that would likely catch attention in a home lab setup.
Port Overview
One of the reasons I chose the ZimaBoard 832 is its well-thought-out selection of ports, which make it highly adaptable for different setups.
Front Ports: The front of the board houses the essential connectivity options:
2x Gigabit Ethernet LAN Ports
- These will be critical for my firewall setup, allowing me to separate WAN and LAN traffic.
- It is important to note that if you have a 10Gbps internet connection, this board will not be able to take full advantage of it, as it is limited to 1Gbps.
2x USB 3.0 Ports
- These can be used for external storage, boot drives, or even a USB network adapter.
Mini DisplayPort (Supports up to 4K)
- I do not expect to use this much since this will be a headless setup, but it is good to have for initial configuration or troubleshooting.
12V DC Power Input
- Standard barrel-jack power input for powering the board.
Back Ports: The back of the ZimaBoard has a few additional ports focused on storage expansion:
2x SATA 3.0 Ports + SATA Power Connector
- These allow for direct connection to 2.5-inch SSDs or hard drives.
- The board comes with a SATA cable, which is a useful addition.
Side Ports
- This allows for future expandability, such as adding an extra network interface card (NIC), an NVMe SSD, or another expansion card.
- Having a full PCIe slot on a board of this size is a significant advantage, making it more versatile than many similar devices.
For a compact board, the ZimaBoard 832 offers a strong selection of ports, making it well-suited for firewall setups, NAS applications, and lightweight server tasks.
Hardware Specifications
The ZimaBoard 832 is designed for low-power, always-on workloads. Here is an overview of its hardware specifications:
Processor: Intel Celeron J3455
- Quad-core processor running at 1.5GHz, with a boost clock of 2.3GHz.
- It is not a high-performance CPU, but for a firewall, home server, or lightweight virtualization, it is well-suited.
- Efficient, passively cooled, and requires minimal power.
Graphics: Intel HD Graphics 500
- Not intended for heavy graphical workloads, but supports 4K output via DisplayPort.
- Useful if a graphical interface is ever needed for troubleshooting.
Memory & Storage
RAM: 8GB LPDDR4 (non-upgradeable)
- The memory is soldered onto the board, meaning the configuration cannot be changed.
- 8GB is sufficient for firewall operations, lightweight server tasks, and containerized applications.
Storage: 32GB eMMC
- While this is fine for basic tasks, additional storage may be necessary for certain applications.
- Expansion options include SATA, M.2, or USB storage devices.
This board is not built for high-performance computing, but for its intended use case as a firewall, NAS, or lightweight server, it offers a solid balance of efficiency and capability.
Pre-Installed OS: CasaOS
Out of the box, the ZimaBoard 832 comes with CasaOS, which is based on Debian. It is a lightweight, web-based operating system designed for self-hosting applications and managing storage.
CasaOS provides a user-friendly dashboard where applications like Nextcloud, Plex, and Docker containers can be installed and managed easily. It is targeted at home lab users who want a simple way to run self-hosted services without dealing with complex configurations.
For my use case, I will not be using CasaOS. Since I plan to use this as a firewall, I will be installing OPNsense instead. However, for anyone looking to set up a home server quickly, CasaOS is a useful starting point.
Conclusion & Next Steps
The ZimaBoard 832 is another key addition to my lab setup. It is well-built, compact, and provides all the connectivity options I need for a dedicated firewall. The passive cooling design and low power consumption make it ideal for 24/7 operation, and the expandability via PCIe and SATA ensures it can adapt to different setups.
In my next step, I will be installing OPNsense on this board. This will be my first time using OPNsense, and I am looking forward to exploring its features and performance.
Stay tuned for the setup guide, and if you are interested in building your own firewall or lab environment, the ZimaBoard 832 is worth considering.
