"I'm happy to announce the release of pfSense 2.1.1. The largest change is to close the following security issues / CVEs: FreeBSD-SA-14:01.bsnmpd / CVE-2014-1452; FreeBSD-SA-14:02.ntpd / CVE-2013-5211; FreeBSD-SA-14:03.openssl / CVE-2013-4353, CVE-2013-6449, CVE-2013-6450. Other than these, the em/igb/ixgb/ixgbe drivers have been upgraded to add support for i210 and i354 NICs. Some Intel 10Gb Ethernet NICs will also see improved performance."
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.