pfSense® software is a free, open source customized distribution of FreeBSD specifically tailored for use as a firewall and router that is entirely managed via web interface. In addition to being a powerful, flexible firewalling and routing platform, it includes a long list of related features and a package system allowing further expandability without adding bloat and potential security vulnerabilities to the base distribution.
The pfSense project was started in September 2004 by Chris Buechler and Scott Ullrich, with a growing development team. Chris is a long time contributor to the m0n0wall project. m0n0wall is a great embedded firewall, but one of the great things about its design is also a limitation to expandability. m0n0wall runs entirely from RAM, the entire OS and all applications are loaded into RAM at boot time. This is a great design for embedded systems, for performance and reliability reasons. However m0n0wall is not capable of being installed into a normal file system on a hard drive. Hence many desirable functions can't be reasonably implemented.
See this blog post for background on the name behind pfSense software.
pfSense is Copyright 2004-2016 Electric Sheep Fencing, LLC
Current logo is Copyright 2005-2015 Electric Sheep Fencing, LLC
pfSense is a federally registered trademark of Electric Sheep Fencing LLC. Any unauthorized use of this trademark is prohibited by state and federal law and international treaties.
All rights reserved.
pfSense is open source and distributed under the Apache 2.0 license.
We look forward to your patches. Before we can accept them, you must sign and submit (via postal mail, email, or electronic submission) an Individual Contributor License Agreement (ICLA) or a Corporate Contributor License Agreement (CCLA).
The purpose of this agreement is to clearly define the terms under which intellectual property has been contributed to the pfSense project and thereby allow us to defend the project should there be a legal dispute regarding the software at some future time. From the individual contributor agreement: "This license is for Your protection as a Contributor as well as the protection of ESF; it does not change your rights to use your own Contributions for any other purpose."
To contact us with sales questions or comments, you can reach us by email at firstname.lastname@example.org or by phone at 1 (512) 900-2546.
To contact us for submitting patches, inquiring about contributing to the project, notifying us of problems with any of our web sites, or any other non-support issue email email@example.com.
To contact us for security issues, use firstname.lastname@example.org.