The Howdy Glossary

pfSense is an open-source network security software package that functions as a firewall and can also serve as a router, DHCP server, DNS server, or VPN endpoint. It is based on the FreeBSD operating system with a custom kernel and offers stateful packet inspection through the PF (Packet Filter) along with advanced traffic control capabilities. The software can be configured and managed via a user-friendly web interface, making it accessible to both novice and experienced users.

Chris Buechler and Scott Ullrich founded Electric Sheep Fencing LLC in 2004 to develop pfSense, which has since gained widespread use and respect within the networking community. pfSense aims to provide robust network security by enhancing control over network traffic at the protocol level through stateful packet inspection. Its intuitive web interface simplifies configuration and management tasks for users looking for comprehensive security solutions.

pfSense distinguishes itself from competitors like OPNsense, Sophos UTM, Untangle NG Firewall, and Smoothwall through its strong foundation on FreeBSD with a custom kernel that ensures stability and performance. Its versatile functionality integrates firewall services with routing, DHCP, DNS services, and VPN support in one platform. The advanced stateful packet inspection via PF (Packet Filter) allows granular control over network traffic for enhanced security measures. Additionally, its user-friendly web interface further bolsters its appeal by providing an efficient means of managing complex network configurations effectively.