# pfSense

> operating system and firewall

**Wikidata**: [Q310946](https://www.wikidata.org/wiki/Q310946)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/PfSense)  
**Source**: https://4ort.xyz/entity/pfsense

## Summary
pfSense is a free and open-source network operating system and firewall that provides network security by monitoring and controlling incoming and outgoing traffic based on predetermined security rules. It is widely used for its comprehensive features and reliability in network protection.

## Key Facts
- pfSense is classified as a network operating system, firewall, operating system distribution, and free and open-source software
- It is based on m0n0wall, another firewall distribution
- OPNsense succeeded pfSense, launching on January 2, 2015
- Current stable versions include 24.11 (released November 25, 2024) and 2.8.0 (released May 28, 2025)
- The official website is https://www.pfsense.org/, with documentation available at https://docs.netgate.com/
- pfSense has a verified Twitter account (@pfsense) since December 12, 2011
- Source code is hosted on GitHub at https://github.com/pfsense/pfsense
- As of June 1, 2025, pfSense has 28,390 social media followers
- It operates under the Apache License
- The project has a subreddit (PFSENSE) and community on Lemmy (pfsense@lemmy.world)

## FAQs
### Q: What is pfSense primarily used for?
A: pfSense is primarily used as a network firewall and security system that monitors and controls network traffic based on predefined security rules, providing both individual users and organizations with robust network protection.

### Q: Is pfSense free to use?
A: Yes, pfSense is free and open-source software released under the Apache License, making it accessible without licensing fees for personal or commercial use.

### Q: How does pfSense compare to OPNsense?
A: OPNsense succeeded pfSense, launching in 2015 as a separate fork. While they share common origins, OPNsense developed independently as a new open-source firewall initiative, while pfSense continues to be developed separately with its own release cycle.

## Why It Matters
pfSense matters because it provides organizations and individuals with a powerful, flexible, and cost-effective solution for network security. As an open-source alternative to commercial firewall products, it democratizes access to advanced network protection features. Its comprehensive capabilities address critical security needs while remaining budget-friendly. Additionally, its active development community ensures continuous improvement and adaptation to evolving security threats. The relationship between pfSense, its predecessor m0n0wall, and successor OPNsense demonstrates the collaborative nature of open-source development and the ongoing evolution of network security solutions in response to technological changes and security challenges.

## Notable For
- Being a comprehensive open-source firewall solution that combines network operating system capabilities with security features
- Having a dedicated community with social media presence growing to over 28,000 followers
- Maintaining separate development from its successor OPNsense while continuing to release new versions
- Providing both traditional version numbering (2.8.0) and date-based versioning (24.11) to accommodate different user preferences
- Offering extensive documentation and support through its official website and GitHub repository

## Body
### Origins and Development
pfSense originated as a fork of m0n0wall, another firewall distribution. It was separated from m0n0wall to develop into a more comprehensive network operating system. The project has maintained its own development path despite the later emergence of OPNsense in 2015. The source code is hosted on GitHub and continues to be actively developed, with regular releases of both traditional and date-based versions.

### Technical Specifications
pfSense operates as a network operating system and firewall, providing comprehensive network security features. It is built on FreeBSD (indicated by platform Q272629) and includes functionality to monitor and control network traffic based on predetermined security rules. The system offers various security capabilities through its open-source architecture.

### Licensing and Distribution
The project is distributed under the Apache License (P143: Q328, Q48183), making it free and open-source software. It is available for download and use without licensing fees, though users are required to comply with the terms of the Apache License. The software is distributed as an operating system distribution, combining the core operating system with applications and infrastructure for easy use.

### Community and Documentation
pfSense has established an active user community with a subreddit (PFSENSE), a verified Twitter account (@pfsense), and a presence on Lemmy (pfsense@lemmy.world). The project provides comprehensive documentation through its official website (https://www.pfsense.org/) and additional resources at https://docs.netgate.com/. The community has grown to include over 28,000 social media followers as of June 2025.

### Version History
pfSense has followed an interesting versioning approach, releasing both traditional numbered versions and date-based versions:
- Version 2.7.2 (stable, released December 7, 2023)
- Version 24.03 (stable, released April 23, 2024)
- Version 24.11 (stable, released November 25, 2024)
- Version 2.8.0 (stable, released May 28, 2025)

This dual versioning strategy accommodates different user preferences while maintaining compatibility and feature development.

### Related Projects
Several projects are related to pfSense:
- m0n0wall: The project from which pfSense was forked
- OPNsense: The successor that launched in 2015
- Miru directory server: A derivative work related to pfSense

## Schema Markup
```json
{
  "@context": "https://schema.org",
  "@type": "Thing",
  "name": "pfSense",
  "description": "A free and open-source network operating system and firewall for monitoring and controlling network traffic based on security rules.",
  "url": "https://www.pfsense.org/",
  "sameAs": [
    "https://www.wikidata.org/wiki/Q170916",
    "https://en.wikipedia.org/wiki/PfSense"
  ],
  "additionalType": "Network operating system, Firewall"
}

## References

1. [Versions of pfSense software and FreeBSD](https://docs.netgate.com/pfsense/en/latest/releases/versions.html)
2. [Versions of pfSense software and FreeBSD | pfSense Documentation](https://docs.netgate.com/pfsense/en/latest/releases/versions.html)
3. Freebase Data Dumps. 2013
4. [Source](https://api.github.com/repos/pfsense/pfsense)
5. Quora
6. [Security Information](https://www.pfsense.org/security/)