watchguard firebox system software version 6.0 can run on microsoft windows 98, windows nt 4.0, windows 2000, or windows xp as specified below:

    windows 98 requirements

    ?microsoft windows 98

    windows nt requirements

    ?microsoft windows nt 4.0

    ?microsoft service pack 4, service pack 5, or service pack 6a for

    windows nt 4.0

    windows 2000 requirements

    ?microsoft windows 2000 professional or windows 2000 server

    windows xp requirements

    ?microsoft windows xp