10 Best Open Source Firewalls 2020

Gareth Otwell Reviewed by Gareth Otwell | Last Updated:

After analyzing 83 products, scanning 415 reviews, spending more than 36 hours of research and speaking with our test users, we think the OPNsense Fanless Compact Open Source Freebsd Firewall Solution is the one of the Best Open Source Firewall on the market.

# Image Name Brand Price
1
⭐Best Choice
OPNsense Fanless Compact Open Source Freebsd Firewall Solution
OPNsense Fanless Compact Open Source Freebsd Firewall Solution, 4 x Intel GbE LAN Check price N/A $$$$$ Check price
2
👑Premium Pick
Protectli Firewall Appliance with 4X Intel Gigabit Ports
Protectli Firewall Appliance with 4X Intel Gigabit Ports, Quad Core Celeron, AES-NI (NO RAM, NO SSD) Check price Protectli $$$$$ Check price
3 Network Security with pfSense: Architect Network Security with pfSense: Architect, deploy, and operate enterprise-grade firewalls Check price N/A $$$$$ Check price
4
💲Best value for the money
Network Performance and Security: Testing and Analyzing Using Open Source
Network Performance and Security: Testing and Analyzing Using Open Source and Low-Cost Tools Check price N/A $$$$$ Check price
5
Best under $150
Cisco-Linksys BEFSR81 Cable/dsl Router with 8-PT Switch
Cisco-Linksys BEFSR81 Cable/dsl Router with 8-PT Switch Check price Linksys $$$$$ Check price
6 Intellectual Property and Open Source: A Practical Guide to Protecting Intellectual Property and Open Source: A Practical Guide to Protecting Code Check price N/A $$$$$ Check price
7 What is Wireshark? What is Wireshark? Check price N/A $$$$$ Check price
8 Mastering pfSense Mastering pfSense,: Manage, secure, and monitor your on-premise and cloud network with pfSense 2.4, 2nd Edition Check price N/A $$$$$ Check price
9
Best under $100
GL.iNet GL-AR750S-Ext Gigabit Travel AC Router (Slate)
GL.iNet GL-AR750S-Ext Gigabit Travel AC Router (Slate), 300Mbps(2.4G)+433Mbps(5G) Wi-Fi, 128MB RAM, MicroSD Support, OpenWrt/LEDE pre-Installed, Cloudflare DNS, Power Adapter and Cables Included Check price GL.iNet $$$$$ Check price
10 SG-1100 Netgate pfSense Security Gateway Appliance SG-1100 Netgate pfSense Security Gateway Appliance Check price N/A $$$$$ Check price

OPNsense Fanless Compact Open Source Freebsd Firewall Solution – Best Overall Open Source Firewall

OPNsense Fanless Compact Open Source Freebsd Firewall Solution
  • OPNsense Open Source FreeBSD-based Firewall
  • Intel Celeron N3160 Quad Core Processor
  • Includes 4GB Memory, 60GB M.2 SSD
  • 4 x Intel GbE LAN Ports
  • Fanless Compact Form Factor: 5.08" x 4.31" x 1.34"

Protectli Firewall Appliance with 4X Intel Gigabit Ports – Premium Pick

Protectli Firewall Appliance with 4X Intel Gigabit Ports
  • Intel Quad Core Celeron J3160, 64 bit, up to 2.2GHz, AES-NI hardware support
  • 4x Intel i210 Gigabit Ethernet ports
  • Barebone for maximum versatility
  • 2x USB 3.0, 1x RJ-45 COM, 2x HDMI
  • Solid State, Fanless Silent Operation, Compatible with many Open Source Software distributions

Cisco-Linksys BEFSR81 Cable/dsl Router with 8-PT Switch – Best under $150

Cisco-Linksys BEFSR81 Cable/dsl Router with 8-PT Switch
  • LAN Ports - 8 10/100 Mbps RJ-45
  • Package Content - Router, AC Adapter and Power Cord, User Guide and Registration Card
  • WAN Ports - 1

GL.iNet GL-AR750S-Ext Gigabit Travel AC Router (Slate) – Best under $100

GL.iNet GL-AR750S-Ext Gigabit Travel AC Router (Slate)
  • DUAL BAND AC ROUTER: Simultaneous dual band with wireless speed 300Mbps(2.4G)+433Mbps(5G). Convert a public network(wired/wireless) to a private Wi-Fi for secure surfing.
  • OPEN SOURCE & PROGRAMMABLE: OpenWrt/LEDE pre-installed, backed by software repository.
  • VPN CLIENT & SERVER: OpenVPN and WireGuard® pre-installed, compatible with 25+ VPN service providers.
  • LARGER STORAGE & EXTENSIBILITY: 128MB RAM, 16MB NOR Flash and 128MB NAND Flash, up to 128GB MicroSD slot, USB 2.0 port, three Ethernet ports.
  • PACKAGE CONTENTS: Slate (GL-AR750S-Ext) router with 1-year limited warranty, power adapter, USB cable, Ethernet cable and user manual. Please update to the latest firmware from the following link before using: https://dl.gl-inet.com/firmware/ar750s/release/

SG-1100 Netgate pfSense Security Gateway Appliance

SG-1100 Netgate pfSense Security Gateway Appliance
  • Official Netgate with pfSense software, 64-bit ARM v8 SoC up to 650Mbps firewall and 1 Gbps router throughput
  • Use as your Firewall, VPN, Router, Gateway, Cloud Edge networking platform
  • Cost efficient, low power, fanless design, easy GUI management
  • Supports IPsec, OpenVPN, PPTP, IPv6, NAT, BGP, RADIUS
  • Multiple uses: desktop / wall mount & DIN rail mount available

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