9 Best Open Source Firewall Appliances for Home and Small Networks in 2026

The best open source firewall appliance for most home and small office networks is the MOGINSOK MGSRN100, whose Intel N100 and four 2.5GbE ports offer a strong balance of throughput headroom and compact design. The Glovary N150 stands out for buyers who want six 2.5GbE ports, while the Protectli Vault FW4C is a recognizable option for those who value a dedicated firewall appliance brand. The main tradeoff is between newer processors and faster ports versus older, lower-capacity hardware that may suit basic routing but leave less room for demanding services. Port count, network speed, firmware support, and memory headroom matter as much as the appliance label. Read on for how the nine options compare and which one fits your network.

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Key Takeaways

• The **MOGINSOK MGSRN100** ranks first because its Intel N100 platform and four 2.5GbE ports provide a more capable starting point for current home and small office networks than the J3710, J4105, and Atom D525 options.
• The **Glovary N150** is the port-count pick: six 2.5GbE connections can reduce the need for a separate switch in modest setups, though buyers should confirm the exact hardware and software compatibility before purchase.
• Several listings pair older processors such as the **J3710** with 2.5GbE ports; faster interfaces do not by themselves guarantee strong throughput when routing, inspection, or VPN tasks load the CPU.
• The **HUNSN RS02** is the only listed 1U rackmount model, making its form factor its main advantage; its Atom D525, 4GB RAM, and 32GB SSD call for modest workloads.
• The **ANDAQI RJ64** offers four 1GbE PoE ports, a distinct fit for compatible powered devices, while most alternatives focus on faster 2.5GbE networking without stated PoE support.

Our Top Best Open Source Firewall Appliance Picks

ANDAQI RJ64 Barebone Firewall Appliance with 4-Port 1GbE PoE		Best for PoE Setups	Processor: Intel N95 or N97; one of the two is shipped	Memory: One DDR5-4800 SODIMM slot, up to 48GB; RAM not included	Storage: One M.2 2280 NVMe slot; drive not included	VIEW LATEST PRICE	See Our Full Breakdown
Glovary N150 Fanless Mini PC Firewall, 6-Port 2.5GbE, 8GB RAM, 128GB NVMe SSD		Best Overall for Multi-Gig Networks	Processor: Intel N150, 4 cores / 4 threads, up to 3.6GHz	Memory: 8GB DDR5 SO-DIMM	Storage: 128GB NVMe SSD; two M.2 2280 NVMe slots and one SATA 3.0 connection	VIEW LATEST PRICE	See Our Full Breakdown
MOGINSOK MGSRN100 Fanless Firewall Mini PC with Intel N100, 4x 2.5GbE Ports		Best for OS Flexibility	Processor: Intel Alder Lake N100, 4 cores / 4 threads, up to 3.4GHz	Memory: One DDR5-4800 slot, up to 32GB	Storage: One M.2 PCIe 3.0 slot	VIEW LATEST PRICE	See Our Full Breakdown
Fanless Firewall Appliance with Intel Pentium J3710, 4 Intel i226 LAN Ports, 8GB RAM, 128GB SSD		Best Preconfigured Compact Pick	Processor: Intel Pentium J3710, 4 cores / 4 threads, up to 2.64GHz	Memory: 8GB DDR3, maximum 8GB	Storage: 128GB mSATA SSD; supports up to 512GB mSATA, HDD not supported	VIEW LATEST PRICE	See Our Full Breakdown
HUNSN RS02 1U Rackmount Firewall Appliance, Intel Atom D525, 4 Gigabit LAN, 4 GB RAM, 32 GB SSD		Best for Legacy Rack Installs	Processor: Intel Atom D525, 1.80GHz	Memory: 4GB DDR3	Storage: 32GB SSD	VIEW LATEST PRICE	See Our Full Breakdown
Fanless Firewall Mini PC with Intel Celeron J4105, 4-Port 2.5GbE, 8GB RAM and 240GB SSD		Best for a Faster Processor	Processor: Intel Celeron J4105, 4 cores / 4 threads, up to 2.5 GHz	Memory: 8GB DDR4; supports up to 16GB	Storage: 240GB mSATA SSD; supports up to 512GB	VIEW LATEST PRICE	See Our Full Breakdown
Protectli Vault FW4C Fanless Firewall Mini PC, Intel Celeron J3710, 4 × 2.5GbE Ports, 8GB RAM, 120GB SSD		Best for Open-Source Firewall Setup	Processor: Intel Celeron J3710 quad-core, 1.6 GHz up to 2.6 GHz	Memory: 8GB DDR3 RAM	Storage: 120GB SSD	VIEW LATEST PRICE	See Our Full Breakdown
Fanless Mini Firewall PC with Intel J3710, 4 Intel I226-V LAN Ports, 8GB RAM, 240GB SSD		Best Compact Low-Power Pick	Processor: Intel J3710 quad-core, up to 2.40 GHz (also listed as 2.64 GHz)	Memory: 8GB DDR3 RAM	Storage: 240GB mSATA SSD; supports up to 512GB	VIEW LATEST PRICE	See Our Full Breakdown
Fanless J3710 Mini PC Firewall Appliance with 4-Port 2.5GbE		Best for OPNsense and Virtualization Labs	Processor: Intel Pentium J3710, 4 cores / 4 threads, up to 2.64 GHz	Memory: 8GB DDR3L	Storage: 128GB SSD	VIEW LATEST PRICE	See Our Full Breakdown

More Details on Our Top Picks

1. ANDAQI RJ64 Barebone Firewall Appliance with 4-Port 1GbE PoE

   

   Best for PoE Setups

   View Latest Price

   The ANDAQI RJ64 is the specialist pick here: its four 1GbE PoE ports can power compatible network devices directly, which may simplify a small camera or access point setup. That makes it a different fit from the Glovary N150, whose six 2.5GbE ports favor faster wired links but do not list PoE. The tradeoff is that the RJ64 arrives as a barebone system: buyers must supply memory, an NVMe drive, and an operating system, and the processor may be either an N95 or N97. Its listed forwarding rate is about 1Gbps, so it is better suited to modest connections than a high-throughput multi-gig network. TPM 2.0 and AES-NI add useful security support, but this is a build-it-yourself choice rather than a ready-to-configure appliance.

   Pros:

   • Four 1GbE PoE ports can power compatible network devices
   • TPM 2.0 and AES-NI support
   • Compact chassis with a cooling fan
   • Supports compatible FreeBSD-based router systems and Linux

   Cons:

   • RAM, NVMe storage, and operating system must be supplied separately
   • N95 or N97 processor is shipped without a guaranteed choice
   • Listed LAN-to-WAN forwarding is approximately 1Gbps

   Best for: Home lab builders who want a compact open-source firewall with PoE ports for compatible access points or cameras

   Not ideal for: Buyers who want a ready-to-run firewall, multi-gigabit routing, or certainty about the exact processor shipped

   • Processor:Intel N95 or N97; one of the two is shipped
   • Memory:One DDR5-4800 SODIMM slot, up to 48GB; RAM not included
   • Storage:One M.2 2280 NVMe slot; drive not included
   • Network:Four Intel I210-AT 1GbE PoE LAN ports
   • Forwarding:Approximately 1Gbps LAN-to-WAN
   • Security:TPM 2.0 and AES-NI support
   • Dimensions:210 x 201 x 45mm
   • Operating system:Not included; UEFI support
   Our verdict

   “Choose the ANDAQI RJ64 if PoE and build-your-own flexibility matter more than multi-gigabit ports or an included operating system.”

   → See it on Amazon →

2. Glovary N150 Fanless Mini PC Firewall, 6-Port 2.5GbE, 8GB RAM, 128GB NVMe SSD

   

   Best Overall for Multi-Gig Networks

   View Latest Price

   For a multi-gig home or small-office network, the Glovary N150 makes the strongest all-around case in this group: six 2.5GbE Intel i226-V ports leave room for several LAN segments while preserving faster links. It also comes with 8GB RAM and a 128GB NVMe SSD, so setup involves less parts sourcing than the barebone ANDAQI RJ64 or MOGINSOK MGSRN100. Its fanless body suits a quiet office or media cabinet, and the second M.2 slot plus SATA connection provide room to expand. The included memory and storage are a practical starting point, though they may constrain heavier add-ons or logging workloads. Buyers should also note that the provided product information gives no reliability history. Choose it for port flexibility and a ready hardware base, not for proven long-term track record.

   Pros:

   • Six 2.5GbE Intel i226-V ports support multiple wired segments
   • Includes 8GB DDR5 RAM and a 128GB NVMe SSD
   • Fanless aluminum body supports quiet operation
   • Two M.2 slots and SATA connection allow storage expansion

   Cons:

   • Included 8GB RAM may constrain heavier services or virtualization
   • Product information does not provide reliability history
   • Fanless cooling may be less suitable for sustained heavy workloads

   Best for: Households and small offices moving to multi-gig internet that need several wired segments and prefer included RAM and storage

   Not ideal for: Buyers who need a documented reliability record or plan to run memory- and storage-intensive firewall services without upgrades

   • Processor:Intel N150, 4 cores / 4 threads, up to 3.6GHz
   • Memory:8GB DDR5 SO-DIMM
   • Storage:128GB NVMe SSD; two M.2 2280 NVMe slots and one SATA 3.0 connection
   • Networking:Six 2.5GbE Intel i226-V LAN ports
   • Cooling:Fanless aluminum body; optional 80 x 10mm fan support
   • Video:Two HDMI and one USB-C; triple 4K@60Hz display support
   • Operating systems:OPNsense, Linux, and OpenWrt
   • Included accessories:Power adapter, SATA 3.0 cable, fan cable, and VESA bracket
   Our verdict

   “Pick the Glovary N150 for a quiet multi-gig firewall with six ports and core hardware already installed.”

   → See it on Amazon →

3. MOGINSOK MGSRN100 Fanless Firewall Mini PC with Intel N100, 4x 2.5GbE Ports

   

   Best for OS Flexibility

   View Latest Price

   The MOGINSOK MGSRN100 suits buyers who want to choose their firewall platform: the listing says pfSense Plus comes pre-installed, while also naming OPNsense, OpenWrt, and Windows as supported options. Its four Intel I226 2.5GbE ports cover a capable small-network setup, though the Glovary N150 offers six ports for more wired segments. The N100 and fanless design make for a low-power, quiet appliance, and support for up to 32GB memory gives this model more headroom than the J3710 appliance, which caps out at 8GB. There is a configuration caveat: memory and an M.2 drive may be optional in the barebone version, so buyers should confirm what their chosen configuration includes. Some operating systems may also lack compatible network drivers.

   Pros:

   • Four Intel I226 2.5GbE ports
   • Fanless design and 6W processor TDP
   • Supports up to 32GB DDR5 memory
   • Multiple firewall operating system options are listed

   Cons:

   • Barebone configuration may not include memory or an SSD
   • Some operating systems may lack compatible network drivers
   • Four ports provide fewer wired connections than the Glovary N150

   Best for: Firewall enthusiasts who want to switch among pfSense Plus, OPNsense, and OpenWrt on a quiet multi-gig appliance

   Not ideal for: Buyers who need six or more Ethernet ports, guaranteed included RAM and storage, or broad driver support across operating systems

   • Processor:Intel Alder Lake N100, 4 cores / 4 threads, up to 3.4GHz
   • Memory:One DDR5-4800 slot, up to 32GB
   • Storage:One M.2 PCIe 3.0 slot
   • Network:Four Intel I226 2.5GbE ports
   • Cooling:Fanless
   • Power:6W TDP
   • Operating systems:pfSense Plus pre-installed; supports OPNsense, OpenWrt, Windows, and others
   • Warranty:12 months
   Our verdict

   “Choose the MOGINSOK MGSRN100 if platform flexibility and memory headroom matter more than extra ports or a fully specified bundle.”

   → See it on Amazon →

4. Fanless Firewall Appliance with Intel Pentium J3710, 4 Intel i226 LAN Ports, 8GB RAM, 128GB SSD

   

   Best Preconfigured Compact Pick

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   This J3710 appliance arrives with 8GB RAM and a 128GB mSATA SSD, so it is a simpler starting point than the barebone MOGINSOK MGSRN100. Four 2.5GbE Intel i226-v ports give it faster links than the HUNSN RS02’s four Gigabit ports, while the fanless aluminum chassis favors quiet placement. Its ceiling is the older Pentium J3710 platform: memory tops out at 8GB, and storage is limited to mSATA with HDDs unsupported. That makes it more appropriate for a straightforward OPNsense or pfSense gateway than a box expected to host several virtual machines or demanding services. Proxmox VE compatibility is listed, but the modest memory limit narrows that use. For a small network seeking a ready hardware bundle, it is a practical middle ground with little upgrade runway.

   Pros:

   • Four 2.5GbE Intel i226-v ports
   • Includes 8GB DDR3 memory and a 128GB mSATA SSD
   • Fanless aluminum chassis for quiet operation
   • Compatibility listed for pfSense, OPNsense, Ubuntu, and Proxmox VE

   Cons:

   • Memory is capped at 8GB
   • HDD storage is unsupported and mSATA capacity is limited
   • Older Pentium J3710 platform offers less headroom than the N100 MOGINSOK

   Best for: Home users who want a quiet, preloaded-memory-and-storage firewall for a modest multi-gig network

   Not ideal for: Lab builders planning virtualization, large log retention, or future memory upgrades beyond 8GB

   • Processor:Intel Pentium J3710, 4 cores / 4 threads, up to 2.64GHz
   • Memory:8GB DDR3, maximum 8GB
   • Storage:128GB mSATA SSD; supports up to 512GB mSATA, HDD not supported
   • Network:Four 2.5GbE Intel i226-v ports
   • Cooling:Fanless aluminum alloy chassis
   • Other ports:Two USB 3.0, HDMI, and VGA
   • Dimensions:5.27 x 4.98 x 1.43 inches
   • Operating systems:pfSense, OPNsense, Ubuntu, and Proxmox VE
   Our verdict

   “Choose this J3710 appliance for a quiet, ready-to-configure small-network firewall if its fixed 8GB memory ceiling is enough.”

   → See it on Amazon →

5. HUNSN RS02 1U Rackmount Firewall Appliance, Intel Atom D525, 4 Gigabit LAN, 4 GB RAM, 32 GB SSD

   

   Best for Legacy Rack Installs

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   The HUNSN RS02 earns a place for buyers who specifically need a 1U, 19-inch rackmount firewall with four Ethernet ports and listed support for FreeBSD-based router systems. Its included 4GB RAM and 32GB SSD avoid the parts hunt required by the ANDAQI RJ64, but this is the least capable network choice in the batch: listed WAN-to-LAN throughput is only 200–250Mbps, and the Atom D525 lacks AES-NI. That makes it a poor match for fast broadband or demanding VPN use. Compared with the fanless J3710 appliance, the RS02 trades quieter operation and 2.5GbE for rack fit and included mounting ears. I would reserve it for a modest connection and an existing rack where its older hardware is still sufficient.

   Pros:

   • 1U 19-inch rackmount chassis with mounting ears
   • Four Gigabit Ethernet ports
   • Includes 4GB RAM, a 32GB SSD, and power cord
   • Supports FreeBSD-based router systems and Linux

   Cons:

   • Listed WAN-to-LAN throughput is 200–250Mbps
   • AES-NI is not supported
   • 4GB maximum memory limits heavier firewall workloads

   Best for: Owners of a 19-inch rack who need a basic open-source firewall for a modest broadband connection

   Not ideal for: Buyers with multi-gig internet, heavy VPN needs, or a preference for quiet low-power desktop hardware

   • Processor:Intel Atom D525, 1.80GHz
   • Memory:4GB DDR3
   • Storage:32GB SSD
   • Ethernet:Four Gigabit LAN ports
   • WAN-to-LAN throughput:200–250Mbps
   • Chassis:1U, 19-inch rackmount; 430 x 250 x 50mm
   • Cooling:Fan
   • AES-NI:Not supported
   Our verdict

   “Pick the HUNSN RS02 only if rack mounting is the priority and its listed throughput fits your connection.”

   → See it on Amazon →

6. Fanless Firewall Mini PC with Intel Celeron J4105, 4-Port 2.5GbE, 8GB RAM and 240GB SSD

   

   Best for a Faster Processor

   View Latest Price

   The J4105 processor gives this appliance a different advantage from the J3710-based Protectli Vault FW4C: its four cores can reach 2.5 GHz, which may suit a home lab running firewall services alongside other light network tasks. Four Intel 2.5GbE ports provide room for separate WAN, LAN, and additional network segments, while the included 240GB SSD leaves more storage headroom than the FW4C’s 120GB drive. Its fanless aluminum case and listed 10W draw suit a quiet, low-power installation. The tradeoff is that product information gives conflicting dimensions and weight, making fit harder to confirm. It also lacks HDD support and arrives without a keyboard or mouse. I’d choose it for the processor and included storage, while buyers who value a named firewall appliance may prefer Protectli.

   Pros:

   • Four Intel 2.5GbE ports support multiple network segments.
   • J4105 quad-core processor reaches a listed 2.5 GHz.
   • 240GB mSATA SSD provides more included capacity than the Protectli Vault FW4C.
   • Fanless cooling and listed 10W consumption suit quiet, low-power operation.

   Cons:

   • Conflicting listed dimensions and weight make installation planning uncertain.
   • Does not support HDDs.
   • Keyboard and mouse are not included.

   Best for: Home lab owners who want four 2.5GbE ports, a faster listed processor, and room for firewall logs or packages on a 240GB SSD.

   Not ideal for: Buyers who need a verified enclosure size, HDD storage, or a ready-to-use setup with input peripherals included.

   • Processor:Intel Celeron J4105, 4 cores / 4 threads, up to 2.5 GHz
   • Memory:8GB DDR4; supports up to 16GB
   • Storage:240GB mSATA SSD; supports up to 512GB
   • Network:4 × Intel I226-V 2.5GbE LAN
   • Ports:2 × USB 3.0, HDMI, VGA, DC input
   • Cooling:Fanless aluminum case
   • Power consumption:10W
   • Operating system support:Tested with pfSense, Ubuntu, and other operating systems
   • Mounting:VESA mount included
   Our verdict

   “Choose this J4105 appliance if processor speed and included SSD capacity matter more than consistent physical specifications or HDD support.”

   → See it on Amazon →

7. Protectli Vault FW4C Fanless Firewall Mini PC, Intel Celeron J3710, 4 × 2.5GbE Ports, 8GB RAM, 120GB SSD

   

   Best for Open-Source Firewall Setup

   View Latest Price

   The Protectli Vault FW4C is a focused choice for buyers who want a compact box for pfSense, OPNsense, or another network operating system. Its four 2.5GbE ports make it easier to separate WAN and LAN traffic or add another segment than on a basic two-port appliance. Compared with the J4105 mini PC in this list, the FW4C has a slower, older J3710 processor and half the SSD capacity, so it is less appealing for heavier services or larger local logs. Its AES-NI support is a useful hardware feature for compatible encrypted traffic workloads. The OS-agnostic setup gives experienced users control, but no operating system is preinstalled, so beginners must handle installation themselves. Two USB ports also limit peripheral flexibility.

   Pros:

   • Four Intel 2.5GbE ports support flexible WAN, LAN, and segment layouts.
   • AES-NI hardware support can assist compatible encryption workloads.
   • Fanless passive cooling avoids fan noise.
   • OS-agnostic design supports pfSense, OPNsense, and other software.

   Cons:

   • No operating system is preinstalled, so setup requires manual installation.
   • 120GB SSD provides less capacity than the J4105 mini PC’s 240GB drive.
   • Only two USB 3.0 ports are listed.

   Best for: Network hobbyists and small-office admins who already know how to install pfSense or OPNsense and want a compact four-port 2.5GbE appliance.

   Not ideal for: First-time firewall buyers seeking a preinstalled system, or users planning storage-heavy services and multiple USB peripherals.

   • Processor:Intel Celeron J3710 quad-core, 1.6 GHz up to 2.6 GHz
   • Memory:8GB DDR3 RAM
   • Storage:120GB SSD
   • Ethernet:4 × Intel 2.5GbE ports
   • Ports:2 × USB 3.0, 2 × HDMI, 1 × RJ45 COM
   • Cooling:Fanless passive cooling
   • Power consumption:20W
   • Security:AES-NI hardware support
   • Operating system:None preinstalled; OS agnostic
   Our verdict

   “Pick the FW4C if you want an OS-agnostic, four-port firewall box and are comfortable installing and maintaining the software yourself.”

   → See it on Amazon →

8. Fanless Mini Firewall PC with Intel J3710, 4 Intel I226-V LAN Ports, 8GB RAM, 240GB SSD

   

   Best Compact Low-Power Pick

   View Latest Price

   This J3710 mini PC pairs four Intel I226-V 2.5GbE ports with a fanless chassis and a listed power draw of 6W, making it a fit for quiet, always-on firewall duties. It includes a 240GB mSATA SSD, twice the capacity listed for the Protectli Vault FW4C, while adding HDMI, VGA, and a VESA mount for flexible placement. The processor is an older J3710, so I’d favor it for routing and lighter services rather than workloads that benefit from newer processors, such as the J4105 option in this batch. Product details disagree on power use, dimensions, and weight, which complicates low-power estimates and mounting plans. Memory is fixed at 8GB as described, and the system does not support HDDs.

   Pros:

   • Four Intel I226-V ports support 2.5GbE network links.
   • 240GB mSATA SSD provides more listed capacity than the Protectli Vault FW4C.
   • Fanless design suits quiet, continuous operation.
   • VESA mount and HDMI/VGA outputs offer flexible placement and setup.

   Cons:

   • Power, dimensions, and weight are listed inconsistently.
   • Memory is limited to the included 8GB in the supplied product details.
   • HDDs are not supported.

   Best for: Home network owners seeking a quiet, low-power firewall with four 2.5GbE ports and enough SSD capacity for a modest set of services.

   Not ideal for: Buyers who need expandable memory, HDD storage, or dependable physical and power specifications for a tightly planned installation.

   • Processor:Intel J3710 quad-core, up to 2.40 GHz (also listed as 2.64 GHz)
   • Memory:8GB DDR3 RAM
   • Storage:240GB mSATA SSD; supports up to 512GB
   • Network:4 × Intel I226-V LAN, up to 2.5Gbps
   • Ports:2 × USB 3.0, RS232 COM, HDMI, VGA, DC
   • Cooling:Fanless
   • Power consumption:Listed as 6W and 6.5W
   • Operating system compatibility:Tested with pfSense, Ubuntu, and other open-source operating systems
   • Mounting:VESA mount included
   Our verdict

   “Choose this appliance for a quiet, low-power four-port setup with a larger included SSD, provided the conflicting physical and power details do not affect your deployment.”

   → See it on Amazon →

9. Fanless J3710 Mini PC Firewall Appliance with 4-Port 2.5GbE

   

   Best for OPNsense and Virtualization Labs

   View Latest Price

   With listed support for OPNsense, Linux, ESXi, and Proxmox, this J3710 appliance suits buyers who want to try different network or virtualization setups on one compact box. Its four Intel i225V 2.5GbE ports offer the same basic network separation appeal as the other four-port J3710 units here, while HDMI and DisplayPort give it a different display mix. The listed mSATA and SATA 3.0 slots offer storage options beyond the 128GB SSD included. Compared with the Protectli Vault FW4C, this model lists broader virtualization software support and two storage slots, while the FW4C specifies AES-NI support. Both use an older J3710 processor and 8GB RAM, so neither is a strong fit for memory-heavy virtual machines. Expansion beyond the included storage requires added drives.

   Pros:

   • Listed compatibility includes OPNsense, Linux, ESXi, and Proxmox.
   • Four Intel i225V 2.5GbE ports support firewall and lab networking.
   • mSATA and SATA 3.0 slots provide storage expansion options.
   • Fanless design and compact dimensions suit quiet installations.

   Cons:

   • 8GB DDR3L memory may constrain multiple or memory-heavy virtual machines.
   • 128GB SSD is less included storage than the two 240GB mini PCs in this batch.
   • Adding storage requires a separate drive.

   Best for: Home lab builders who want to experiment with OPNsense, Linux, ESXi, or Proxmox and value two storage interfaces in a compact firewall appliance.

   Not ideal for: Users running several memory-intensive virtual machines or buyers who need more than 8GB RAM without a confirmed upgrade path.

   • Processor:Intel Pentium J3710, 4 cores / 4 threads, up to 2.64 GHz
   • Memory:8GB DDR3L
   • Storage:128GB SSD
   • Storage slots:1 × mSATA, 1 × SATA 3.0
   • Network:4 × Intel i225V 2.5GbE LAN
   • Display outputs:HDMI and DisplayPort
   • Expansion:1 × Mini-PCIe
   • Cooling:Fanless
   • Operating systems:OPNsense, Linux, ESXi, Proxmox
   Our verdict

   “Choose this J3710 appliance for a compact OPNsense or virtualization lab where storage-slot flexibility matters more than RAM capacity.”

   → See it on Amazon →

How We Picked

I ranked these appliances around the needs of someone choosing hardware for open source firewall software: processor capability, network interface speed and count, included memory and storage, cooling and form factor, and how clearly the listing describes the hardware. A capable processor and multiple 2.5GbE ports put the MOGINSOK and Glovary ahead of the older J3710 and Atom D525 systems, while the Glovary’s extra ports give it a different use case. I treated advertised specifications as listing claims, not as proof of compatibility with every firewall distribution.

I also weighed practical fit. The HUNSN earns a place for its 1U rack design, and the ANDAQI’s PoE ports distinguish it from the standard multiport mini PCs, but those advantages do not outweigh limited throughput or a narrower deployment need for most buyers. Where model names and specifications are sparse or inconsistent, I ranked conservatively: verify the exact CPU, NIC chipset, memory configuration, and boot support with the seller before installing OPNsense, pfSense CE, or another system.

Factors to Consider When Choosing Best Open Source Firewall Appliance

An appliance is only a good firewall choice when its hardware matches the software workload and network layout you plan to run. These checks can help prevent a common mismatch: buying for port speed or port count while overlooking CPU capacity, compatibility, or long-term maintenance.

Match CPU headroom to the services you will run

Basic routing and network address translation usually ask less of a processor than encrypted VPN traffic, intrusion detection, or deep traffic inspection. If you expect to enable several demanding services at once, favor a newer CPU and leave headroom for growth instead of buying to meet only today’s internet speed. A 2.5GbE port describes the link, not the throughput the appliance can sustain under every workload. Older processors such as the Atom D525 or J3710 may fit a simple network, but should prompt closer scrutiny for heavier duties. Check independent performance results for the exact processor and software version when available. This matters more than comparing processor names alone.

Count ports by network zones, not by the box

List the connections your firewall must handle: internet, trusted devices, guest network, lab, and any dedicated devices. VLANs can put several logical networks on a managed switch, so a firewall does not always need one physical port per zone. A six-port model can simplify a small installation, but a four-port unit paired with a VLAN-capable switch may be more flexible. Do not assume that extra ports replace a switch or support every topology you have in mind. For PoE devices, confirm both that the appliance actually provides PoE and that its power budget suits the connected equipment. The ANDAQI’s listed PoE feature makes that check especially relevant.

Verify network chipsets and software support

Open source firewall systems rely on drivers for the appliance’s network interfaces, and chipset support can vary by operating system version. Confirm the exact NIC model and check current compatibility reports for the distribution you plan to install. The phrase “Intel i226” or “2.5GbE” in a listing is useful, but it does not answer questions about firmware, interface stability, or installation support on its own. Ask whether the unit can boot from your intended installation media and whether its BIOS allows the settings you need. Treat vague or conflicting specifications as a reason to get written clarification before buying. This step can save time that would otherwise go into troubleshooting a device that cannot reliably see its ports.

Plan RAM and storage around add-ons

Memory and storage needs depend on logging, retained history, packages, and the number of services you enable. The included 8GB configurations offer a more comfortable baseline than the HUNSN’s listed 4GB, but requirements depend on the operating system and workload. A larger SSD can provide more room for logs and updates, yet storage capacity cannot compensate for a CPU that struggles with inspection or VPN processing. Check whether RAM and storage are replaceable before treating the listed configuration as fixed. If you expect to keep detailed logs, plan where those records will live and how long you need to retain them. This avoids filling the appliance’s disk with data you meant to keep elsewhere.

Account for cooling, noise, and placement

Fanless designs can reduce noise and eliminate a moving part, which suits an office shelf or living space. They still need airflow and can throttle or run hot if placed in an enclosed cabinet. Rackmount hardware fits a rack cleanly, but its age and listed components matter more than the format when it comes to capability. Measure the space, check ventilation, and confirm the power supply and mounting details before choosing based on appearance alone. Also decide where the appliance will sit relative to the modem, switch, and backup power. These practical details affect whether maintenance stays simple.

Choose for support and recovery, not only setup day

Open source software gives buyers flexibility, but the appliance vendor’s update policy and documentation still shape the ownership experience. Look for clear BIOS updates, warranty terms, replacement parts, and a way to reset or recover the system if an upgrade fails. Keep a copy of the firewall configuration somewhere outside the appliance so a failed SSD does not force a rebuild from memory. Before relying on a device for the whole household or office, confirm you can restore a backup and regain access to the management interface. Buyers new to firewall software should favor well-documented hardware and a straightforward recovery path over obscure specifications. That choice can matter more over time than an extra port.

Frequently Asked Questions

Can I install OPNsense or pfSense CE on any of these appliances?

Do not assume that every appliance works with every distribution simply because it is sold as a firewall. Compatibility depends on the exact processor, network chipset, boot firmware, and operating system version. Before buying, confirm the network interfaces are supported and check whether users report stable operation with your intended release. Ask the seller for precise chipset details if the listing only says “2.5GbE.” Keep a recovery plan in case an installation or update leaves the device unreachable.

Is a 2.5GbE appliance a good choice if my internet connection is slower?

It can still make sense if you use a fast local network, expect to upgrade your internet service, or want headroom between the firewall and a switch. For a slower connection with basic routing, older 1GbE hardware may be enough, depending on the rest of the workload. The key is whether the CPU can handle your enabled services at the speeds you need; link speed alone cannot answer that. Also check whether the rest of your network supports 2.5GbE, or the faster ports may not change current transfer speeds. Choose based on the full path from device to device, not just the firewall’s port label.

Should I choose more ports or a faster processor?

Choose ports when they solve a specific wiring need, such as connecting separate zones without adding a switch. Choose processor headroom when you plan to run VPN encryption, traffic inspection, or several packages at once. VLANs on a managed switch can often provide multiple logical networks through fewer physical firewall ports. Extra ports do not improve processing capacity, and a stronger CPU does not create more physical connections. Sketch your network and workload first, then prioritize the constraint that would otherwise limit it.

Is the HUNSN RS02 suitable for a modern small office firewall?

The HUNSN RS02’s 1U rackmount form makes it easy to place in a rack, but its listed Atom D525 processor, 4GB of RAM, and 32GB SSD point toward modest duties. It may suit a simple, low-throughput setup where rack fit matters more than current performance headroom. I would be cautious about relying on it for demanding VPN or inspection workloads without reliable benchmarks for the exact configuration. Compare its age and specifications with the newer N100 and N150 choices before committing. Confirm software support for its exact network interfaces as well.

What should I verify before ordering a fanless mini PC firewall?

Get the exact CPU and network chipset details, then check that your intended open source firewall system supports them. Confirm how much RAM and storage are included, whether you can replace them, and what power supply ships with the unit. For a fanless case, ask about airflow requirements and leave room for heat to escape in your planned location. If you need PoE, verify which ports provide it and the available power budget. Finally, check warranty, BIOS update availability, and the return process in case the hardware does not work with your chosen software.

Conclusion

For most home and small office buyers, I recommend the MOGINSOK MGSRN100 as the best overall because its N100 processor and four 2.5GbE ports provide a balanced platform. The Glovary N150 is my pick for buyers who need six 2.5GbE ports, while the ANDAQI RJ64 suits a specific PoE-focused setup where four 1GbE ports meet the network’s needs. If you are new to open source firewall software, choose the appliance whose chipset support, documentation, and recovery process you can verify; the Protectli Vault FW4C is a distinct brand-led option, though its listed J3710 platform deserves a careful workload check. For rack installations with basic routing needs, the HUNSN RS02 offers the dedicated 1U format, but its older specifications make it a poor fit for buyers seeking substantial performance headroom. I would treat the J3710 and J4105 listings as budget or light-duty candidates until exact component support and workload performance are confirmed.

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