You gotta be more specific than FW-1. FW-1 can run over a large number
of OS. You can get FW-1 for WinNT, Solaris, Linux, BSD . Each has the
strengths and weaknesses of the underlying OS. Also FW-1 can run on a
large number of hardware platforms, PCI, Compact-PCI, Sparc, etc. Each
has it's strengths and weaknesses.