OPNSense vs pfSense: Which One Is Better in 2024?

OPNsense vs pfSense

OPNsense and pfSense are similar open-source firewall solutions. Choosing the right firewall configuration for your needs is vital to securely protecting your network. 

If you’re wondering which one you should choose, we’ll help you shed light on the OPNSense vs pfSense debate, comparing their functionalities, user experiences, and suitability for various needs. 

Whether you're an experienced network administrator or just starting out, understanding the key differences between the two is essential. By the end of this comparison, you’ll better understand which is the best choice for you.

If you’re ready to dive into pfSense vs OPNsense, let’s begin. 

About OPNSense and pfSense Firewalls

Both pfSense and OPNsense target a wide range of users, from home enthusiasts to small and medium businesses and enterprise environments. 

They’re designed to be versatile and capable of addressing various network security needs, including firewall protection, virtual private networks (VPNs), traffic shaping, and more.

About OPNSense

OPNSense is an open-source firewall and routing solution based on FreeBSD created by Deciso. OPNSense was started as a fork by a group of pfSense developers in December 2014.

OPNsense emphasizes user-friendliness, security, and innovation. It aims to offer a modern and intuitive interface, frequent updates for security and features, and a commitment to transparency and community involvement in its development.

While you can use the OPNsense software for free, a cost will be involved if you’re looking for pre-installed hardware. This cost can vary depending on the hardware you select.

About pfSense

pfSense is another open-source firewall and routing platform based on FreeBSD developed and maintained by Netgate. It was forked from the m0n0wall project in 2004 and has been actively developed since then. 

The core philosophy of pfSense is centered on providing a professional, reliable, and accessible open-source firewall solution. It focuses on flexibility, allowing users to tailor the system to their needs, from basic network setups to complex enterprise environments.

pfSense software is free to download and use. However, there are costs involved if you want to run pfSense on dedicated hardware.

Features, Design, and Performance of OPNSense and pfSense

The features and design of pfSense and OPNSense can significantly influence which firewall solution you select. While both offer similar capabilities, comparing factors like their interface and flexibility can help determine the best option for your needs.

OPNSense Features and Design

OPNSense offers a great user experience with multi-language support, built-in help, and quick navigation with the search box. 

OPNsense offers a more modern and intuitive interface, with a menu bar on the left side, making it easier to find and access various settings, enhancing your experience with logical arrangement and a cleaner interface. 

OPNSense Features and Design
Source: OPNSense documentation

OPNSense includes security features such as a stateful inspection firewall, intrusion detection and prevention using Suricata and Emerging Threats rules, SSL/TLS encryption, and proactive security updates. OPNsense provides traffic shaping, captive portal support, and multi-WAN capabilities for access control and flexibility.

Several built-in reporting and monitoring tools enhance functionality while simplifying management through its intuitive web interface, real-time traffic monitoring, VPN support, and a plugin system. High availability, hardware failover, and easy setup for intrusion prevention build resilience and ease of use. 

Performance optimization is a central focus, with OPNsense built to operate efficiently on different hardware. OPNSense continuously improves security while optimizing performance and resource utilization. 

pfSense Features and Design 

pfSense features a web-based interface that is functional and comprehensive, focusing on providing a wide range of configuration options and settings. The menu bar is located at the top, leading to sometimes complex navigation due to its extensive feature set.

pfSense Features and Design

pfSense provides network security with stateful packet inspection, IP/DNS filtering, and anti-spoofing protections. Intrusion detection is handled by Snort or Suricata, enabling deep packet inspection and attack detection. Strong VPN support via IPsec, OpenVPN, and WireGuard speeds up secure remote access.

The web interface is secured against common attacks like CSRF, and key-based authentication can restrict SSH access. HTTP Strict Transport Security ensures secure web connections.

Several built-in tools simplify network management tasks like traffic shaping, DHCP server, DNS services, captive portal, Dynamic DNS, and more. 

pfSense can be customized extensively through its package system, while user authentication controls and system security management tools enable access controls, and high availability and load balancing features allow pfSense to power network deployments.

pfSense performance can scale across varying hardware due to its optimization on efficient throughput, which enables pfSense to handle everything from small networks to high-bandwidth enterprise environments. 

Use and Support for OPNSense and pfSense

When choosing between these two firewall solutions, it's important to consider their usability and available support. Let's compare their documentation, user communities, and update schedules to determine which is easier to use and maintain.

OPNSense Use and Support

OPNsense, with its intuitive and modern user interface, makes it accessible for those new to firewall and network management. This design helps you easily navigate the interface, reducing the time needed to manage settings such as firewall rules.

Thorough documentation enhances OPNsense's ease of use, with guides and manuals designed to explain features and configurations to new and experienced users.

OPNSense Use and Support

OPNsense also benefits from an active community presence, including dedicated forums and a subreddit where users share tips and advice. Additionally, professional support from the OPNsense Core Team ensures you can get help with more complex or technical issues.

OPNsense Community

OPNsense follows an aggressive update policy, with regular releases that provide security updates, bug fixes, and new features. It has two major updates per year, with revisions every two weeks.

Plugins extend OPNsense's functionality, offering over 80 officially maintained and community-supported options. 

These include DNS management, VPN and connectivity, dynamic routing, web service enhancements like reverse proxy, and security features like antivirus. This allows customization to your specific needs, improving management and security. 

Hardware and virtualization compatibility with hypervisors like VMWare and Virtualbox enable easy deployment in home and enterprise networks, appealing to a wider audience.

pfSense Use and Support

pfSense is known for its extensive customization options and flexibility, appealing to users with different technical skills. While its interface may present a learning curve for newcomers, thorough documentation and community support help overcome this.

This documentation covers topics from basic setup to advanced configurations, making it a great resource for users of all levels. Well-organized and detailed, the docs help you better understand features and capabilities.

pfSense Use and Support

The active pfSense community, including forums, the subreddit, and other platforms, offers extensive support and knowledge on various topics, while professional assistance from Netgate provides help for businesses and advanced users.

Active pfSense community

pfSense follows a more traditional release schedule, aiming for stability and testing before major updates and security patches. This results in you receiving less frequent but reliable updates.

The package system within pfSense extends functionality. Packages can be installed via the GUI to add features like additional filtering, IDS/IPS, VPNs, and system utilities for tailored solutions. With over 60 available packages, it ensures you have versatility for different network traffic needs.

Strong hardware and virtualization compatibility allow you to deploy pfSense on older PCs to modern servers and virtual environments like VMware and Hyper-V. 

OPNSense vs. pfSense

Use Cases for OPNsense and pfSense

While OPNsense and pfSense share a similar underlying framework, key differences between the platforms are important to weigh based on your specific use case and needs. 

Choosing the solution that aligns better with your environment and requirements is crucial. 

OPNsense Use Cases

OPNSense is best suited for users and companies prioritizing ease of use, modern security practices, and frequent updates. 

Its intuitive interface and simple configuration make it accessible for newcomers and small to medium businesses, and it’s ideal for environments where rapid deployment and a user-friendly design are key considerations without sacrificing advanced capabilities.

pfSense Use Cases

pfSense is ideal for tech-savvy users and organizations needing extensive customization and control over their network environment. 

It’s perfect for complex setups requiring advanced features like VPNs, detailed traffic management, or multi-WAN configurations and is suited for both small and large-scale deployments where stability and a robust set of features are priorities.

Both pfSense and OPNsense have their own strengths and ideal use cases, so you should consider the following key factors when deciding which open-source firewall solution suits your needs.

OPNSense vs pfSense Rundown

Let’s do a rapid-fire comparison of these two firewall solutions.

Community and Ecosystem

Both have vibrant communities, but the nature and tone of interactions can differ. Spend some time on their forums or Reddit to get a feel for how supportive and active the community is. This can affect how quickly you can solve problems or find advice for your needs.

Learning Curve

If you're new to networking or basic firewall management, OPNsense's focus on a modern, user-friendly web user interface might make it easier to start. On the other hand, pfSense's extensive documentation and community support can help overcome its steeper learning curve.

Long-term Support and Stability

Consider how each project's update policy aligns with your needs for stability and security. OPNsense's aggressive update schedule ensures you get the latest features and security patches quickly, which is great for environments where staying ahead of security threats is critical. pfSense's more conservative approach might suit environments where stability and testing are more important than having the latest features.

Enterprise Use

For businesses considering one of these solutions, evaluating the level of support you might need is important. Both offer professional support, but the specifics of what's covered, response times, and costs can vary. This is especially important for critical infrastructure where downtime is not an option.

Hardware Requirements

While both are designed to run efficiently on a wide range of hardware, from older PCs to modern servers and specialized network appliances, your specific use cases—such as throughput needs, number of users, and network complexity—might influence your choice. OPNsense and pfSense have different optimization focuses, which could affect the performance of your hardware.

Future Proofing

Consider your future needs. The flexibility to add features through plugins or packages, compatibility with virtualization platforms for easy scaling, and the solution's track record for adopting new technologies are important factors. Both OPNsense and pfSense offer paths for growth, but their development philosophies and community support can influence how quickly and smoothly you can adapt.

Personal Preference

Ultimately, your preference can be a deciding factor based on the user interface, documentation, community feel, and the project's goals. It might be worth setting up a test environment to see which one you prefer working with.

Pros and Cons of OPNsense and pfSense

Let’s take a look at some pros and cons of each solution.

OPNsense Pros and Cons

User-friendly, modern interface
Frequent updates for enhanced security
Focus on cutting-edge security features
Relatively smaller community
Some advanced features might be less customizable compared to pfSense
Less established track record compared to pfSense

pfSense Pros and Cons

Comprehensive features for complex setups
Large, active community support
High customization with extensive packages
Steeper learning curve for beginners
Interface may be less intuitive
Requires more initial setup time for optimal configuration


OPNsense and pfSense are similar open-source firewall solutions, so which one’s the best solution for you will come down to your needs.

If you want high customizability and a large support community, pfSense is a good option. If you prioritize an easy-to-use interface and frequent updates, instead, OPNsense may be better.

Ultimately, pfSense offers more flexibility for seasoned users, but OPNsense provides a more polished out-of-box experience.  

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  • Richard Dezso

    Richard is a cyber security enthusiast, eJPT, and ICCA who loves discovering new topics and never stops learning. In his home lab, he's always working on sharpening his offensive cyber security skills. He shares helpful advice through easy-to-understand blog posts that offer practical support for everyone. Additionally, Richard is dedicated to raising awareness for mental health. You can find Richard on LinkedIn, or to see his other projects, visit his Linktree.