2/22    I know network performance of FreeBSD is better than Linux.  But what
        about FreeBSD vs NetBSD?  Any differences?  Do they use the same
        stack?  I've pretty much decided on *BSD for my firewall/nat/dns box.
        Thanks.
        \_ dont forget openbsd!
        \_ All the stacks for *BSD came from the same place (Cal, in case
           you can't put two and two together). They have been modified
           by the developers of the different BSD projects but all in all
           *BSDs feature the best non-propreitary stack (BSD/OS and Solaris
           are rumored to have better ones (multithreaded)).
           FreeBSD is rumored to have the fastest and most stable stack
           but new hardware support is said to be hard to add. Juniper
           used FreeBSD (a heavily modified version) in most of thier
           routers/switches. The actually routing/switching is done by
           asics, but some of the protocols are run on FreeBSD.
           Riverstone used NetBSD because they found it much easier to
           add support for fiber interfaces and to strip out unneeded
           kernel features. (In care you haven't heard of Riverstone,
           they power all the switches between Nasa Ames, the bay area's
           primary distribution point and Mae West).
           I don't know of any network vendors using OpenBSD. But I
           would highly recommend it for firewall/nat/dns because it
           is probably the most secure OS on the planet. I run it for
           my firewall/nat box.
           ----ranga