pfSense is a m0n0wall-derived operating system. It uses Packet Filter, FreeBSD 6.x (or DragonFly BSD when ALTQ and CARP is finished), ALTQ for excellent packet queuing, and an integrated package management system for extending the environment with new features.
SHA256 checksum: c7a75510459794bcea0b49848c21c09afa281273ae2f544b216c2cd8f51ad5b8