PfSense 2.2.1

For those as ignorant as me, here's the Wikipedia explanation of what PfSense is:

    pfSense is an open source firewall/router computer software distribution
    based on FreeBSD. It is installed on a computer to make a dedicated
    firewall/router for a network and is noted for its reliability and offering
    features often only found in expensive commercial firewalls. It can be
    configured and upgraded through a web-based interface, and requires no
    knowledge of the underlying FreeBSD system to manage. pfSense is commonly
    deployed as a perimeter firewall, router, wireless access point, DHCP
    server, DNS server, and as a VPN endpoint.

> https://en.wikipedia.org/wiki/PfSense

Do checkout OPNsense aswell. It's a PfSense fork with a (more liberal and OSI compliant) BSD license instead of one seemingly created by the org itselves, which actually was one of the reasons for the fork in the first place.

(If I remember correctly, this was also the main reason why the main author of m0n0wall strongly advised to check this fork out in his goodbye message when the m0n0wall project closed up shop)

https://opnsense.org/

How well is the BSD world keeping up with modern QoS and queue management? A quick Google search indicates that PfSense probably has CoDel, but none of its more useful derivatives like fq_codel. And do its network drivers have or need dynamic byte queue limits as included in some drivers for Linux 3.3 and later?

OpenWRT is doing great these days, so what's PfSense still got as its key advantages?

Are they still using PF code imported from OpenBSD 4.5? That code is 6 years old and has been vastly improved over the years.