Not a real FreeBSD user myself, but I've heard that it has good/complete documentation[1], a solid foundation that doesn't change too often and a nicer firewall

Not a real FreeBSD user myself, but I've heard that it has good/complete documentation[1], a solid foundation that doesn't change too often and a nicer firewall than Linux's iptables[2]. Also, it's not really an advantage per se, just interesting, but Mac OS X's kernel is half-derived from FreeBSD's[3]. [1] http://www.freebsd.org/doc/handbook/ http://www.freebsd.org/doc/handbook/ [2] http://www.freebsd.org/doc/handbook/firewalls-pf.html http://www.freebsd.org/doc/handbook/firewalls-pf.html [3] http://en.wikipedia.org/wiki/XNU#BSD http://en.wikipedia.org/wiki/XNU#BSD Edit: cperciva has more/better examples.