Postgres

I am new to this freeradius server, can you give me some idea on how to authenticate freeradius in a postgres database? Also, I need sample configuration to test the server. My NAS client is CISCO(2500) with 11.3 IOS. Help is highly appreciated...... Thank you... Nuel __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com