I have converted ZRadius to work with exUserFolder as an AuthSource
it should function at least as well as it functioned with GUF d8)
-- akm

Radius

    This product implements simple Radius authentication. If you need
    to authenticate Zope users from a Radius server, this product will
    plug into the GenericUserFolder product.

    &copy; Copywrite 1999 Stuart Bishop &LT;zen@cs.rmit.edu.au&GT;

