[c-nsp] Open Source Substitute for Cisco's Secure ACS?

[M Callahan]

We're currently using a very dated version of Cisco's Secure ACS to
authenticate a relatively small group of PPPoE ADSL users.  We have a
planned hardware upgrade for this system, but no funding for updated ACS
software.  That said, I was wondering what open source alternatives folks on
the list have found to be an adequate substitute for ACS.

Thanks,

Mike