and if you don't need a GUI, you can always install OpenBSD -- no extras required. it includes a useful OSPF and BGP daemon, BFD in the next release (I believe)

and if you don't need a GUI, you can always install OpenBSD -- no extras required. it includes a useful OSPF and BGP daemon, BFD in the next release (I believe), and a version of pf that isn't a few years old :)