Give me some suggestions

[Authur Lin <authur@mail.my.net.tw>]

Our company is an ISP. We are looking for solutions that can meet our
requests. Our primary requests are
Authentication/Athentication/Accounting. I have survey several solutions
as following:

1. Radiator + MySQL for Authentication/Athentication/Accounting
2. LDAP for Authentication/Athentication/Accounting
3. Others

I must consider about the flexibility, for example, I have to add an
news service for billing and modify login id and password for customers.
Can someone give me some suggestions that how to use Radiator/LDAP to
fix our requests?

Authur